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7081693493 = 721121312889
BaseRepresentation
bin1101001100001101…
…00001000100110101
3200021112110022012012
412212012201010311
5104000403142433
63130413134005
7340330254500
oct64606410465
920245408165
107081693493
113004482156
12145778a305
1388b20a0a4
144b2744137
152b6aa4848
hex1a61a1135

7081693493 has 12 divisors (see below), whose sum is σ = 8239262220. Its totient is φ = 6069010752.

The previous prime is 7081693481. The next prime is 7081693511. The reversal of 7081693493 is 3943961807.

7081693493 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2077262929 + 5004430564 = 45577^2 + 70742^2 .

It is not a de Polignac number, because 7081693493 - 210 = 7081692469 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7081693393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 542993 + ... + 555881.

It is an arithmetic number, because the mean of its divisors is an integer number (686605185).

Almost surely, 27081693493 is an apocalyptic number.

It is an amenable number.

7081693493 is a deficient number, since it is larger than the sum of its proper divisors (1157568727).

7081693493 is a wasteful number, since it uses less digits than its factorization.

7081693493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24116 (or 24109 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 7081693493 is about 84152.7984858495. The cubic root of 7081693493 is about 1920.3440403631.

The spelling of 7081693493 in words is "seven billion, eighty-one million, six hundred ninety-three thousand, four hundred ninety-three".

Divisors: 1 7 49 11213 12889 78491 90223 549437 631561 144524357 1011670499 7081693493