8657979251 has 2 divisors, whose sum is σ = 8657979252. Its totient is φ = 8657979250.

The previous prime is 8657979241. The next prime is 8657979277. The reversal of 8657979251 is 1529797568.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8657979251 is a prime.

It is not a weakly prime, because it can be changed into another prime (8657979241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4328989625 + 4328989626.

It is an arithmetic number, because the mean of its divisors is an integer number (4328989626).

Almost surely, 2^8657979251 is an apocalyptic number.

8657979251 is a deficient number, since it is larger than the sum of its proper divisors (1).

8657979251 is an equidigital number, since it uses as much as digits as its factorization.

8657979251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9525600, while the sum is 59.

The square root of 8657979251 is about 93048.2630197899. The cubic root of 8657979251 is about 2053.3934872120.

The spelling of 8657979251 in words is "eight billion, six hundred fifty-seven million, nine hundred seventy-nine thousand, two hundred fifty-one".