8465705257 has 2 divisors, whose sum is σ = 8465705258. Its totient is φ = 8465705256.

The previous prime is 8465705249. The next prime is 8465705293. The reversal of 8465705257 is 7525075648.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8074100736 + 391604521 = 89856^2 + 19789^2 .

It is a cyclic number.

It is not a de Polignac number, because 8465705257 - 2³ = 8465705249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8465705257.

It is not a weakly prime, because it can be changed into another prime (8465705357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4232852628 + 4232852629.

It is an arithmetic number, because the mean of its divisors is an integer number (4232852629).

Almost surely, 2^8465705257 is an apocalyptic number.

It is an amenable number.

8465705257 is a deficient number, since it is larger than the sum of its proper divisors (1).

8465705257 is an equidigital number, since it uses as much as digits as its factorization.

8465705257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352000, while the sum is 49.

The square root of 8465705257 is about 92009.2672343390. The cubic root of 8465705257 is about 2038.0791589412.

The spelling of 8465705257 in words is "eight billion, four hundred sixty-five million, seven hundred five thousand, two hundred fifty-seven".