957725521 has 2 divisors, whose sum is σ = 957725522. Its totient is φ = 957725520.

The previous prime is 957725513. The next prime is 957725569. The reversal of 957725521 is 125527759.

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., 957593025 + 132496 = 30945^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 957725521 - 2³ = 957725513 is a prime.

It is not a weakly prime, because it can be changed into another prime (957765521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478862760 + 478862761.

It is an arithmetic number, because the mean of its divisors is an integer number (478862761).

Almost surely, 2^957725521 is an apocalyptic number.

It is an amenable number.

957725521 is a deficient number, since it is larger than the sum of its proper divisors (1).

957725521 is an equidigital number, since it uses as much as digits as its factorization.

957725521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 220500, while the sum is 43.

The square root of 957725521 is about 30947.1407564576. The cubic root of 957725521 is about 985.7051375943.

The spelling of 957725521 in words is "nine hundred fifty-seven million, seven hundred twenty-five thousand, five hundred twenty-one".