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7971063914 = 2113124148497
BaseRepresentation
bin1110110110001110…
…01100100001101010
3202120111222000001102
413123013030201222
5112311043021124
63354543321402
7401346632252
oct73307144152
922514860042
107971063914
113420504330
1216655b0262
139a0551488
145588d4962
15319bd1aae
hex1db1cc86a

7971063914 has 32 divisors (see below), whose sum is σ = 13520466432. Its totient is φ = 3491712000.

The previous prime is 7971063911. The next prime is 7971063923. The reversal of 7971063914 is 4193601797.

It is a Smith number, since the sum of its digits (47) 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 not an unprimeable number, because it can be changed into a prime (7971063911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140114 + ... + 188610.

It is an arithmetic number, because the mean of its divisors is an integer number (422514576).

Almost surely, 27971063914 is an apocalyptic number.

7971063914 is a deficient number, since it is larger than the sum of its proper divisors (5549402518).

7971063914 is a wasteful number, since it uses less digits than its factorization.

7971063914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48782.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 7971063914 is about 89280.8149268363. The cubic root of 7971063914 is about 1997.5857463623.

The spelling of 7971063914 in words is "seven billion, nine hundred seventy-one million, sixty-three thousand, nine hundred fourteen".

Divisors: 1 2 11 22 31 62 241 341 482 682 2651 5302 7471 14942 48497 82181 96994 164362 533467 1066934 1503407 3006814 11687777 16537477 23375554 33074954 128565547 257131094 362321087 724642174 3985531957 7971063914