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7993505 = 513313967
BaseRepresentation
bin11110011111100010100001
3120001010000202
4132133202201
54021243010
6443154545
7124641452
oct36374241
916033022
107993505
11456a703
122815a55
13186b4b0
1410c1129
15a7d6a5
hex79f8a1

7993505 has 16 divisors (see below), whose sum is σ = 10665984. Its totient is φ = 5711040.

The previous prime is 7993499. The next prime is 7993511. The reversal of 7993505 is 5053997.

It is an interprime number because it is at equal distance from previous prime (7993499) and next prime (7993511).

It is not a de Polignac number, because 7993505 - 212 = 7989409 is a prime.

It is a super-2 number, since 2×79935052 = 127792244370050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32 + ... + 3998.

It is an arithmetic number, because the mean of its divisors is an integer number (666624).

Almost surely, 27993505 is an apocalyptic number.

It is an amenable number.

7993505 is a deficient number, since it is larger than the sum of its proper divisors (2672479).

7993505 is a wasteful number, since it uses less digits than its factorization.

7993505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016.

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 7993505 is about 2827.2787269740. The cubic root of 7993505 is about 199.9458603458.

The spelling of 7993505 in words is "seven million, nine hundred ninety-three thousand, five hundred five".

Divisors: 1 5 13 31 65 155 403 2015 3967 19835 51571 122977 257855 614885 1598701 7993505