957345981 has 4 divisors (see below), whose sum is σ = 1276461312. Its totient is φ = 638230652.

The previous prime is 957345979. The next prime is 957346003. The reversal of 957345981 is 189543759.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 957345981 - 2¹ = 957345979 is a prime.

It is a super-2 number, since 2×957345981² = 1833022654673704722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (957344981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159557661 + ... + 159557666.

It is an arithmetic number, because the mean of its divisors is an integer number (319115328).

Almost surely, 2^957345981 is an apocalyptic number.

It is an amenable number.

957345981 is a deficient number, since it is larger than the sum of its proper divisors (319115331).

957345981 is a wasteful number, since it uses less digits than its factorization.

957345981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319115330.

The product of its digits is 1360800, while the sum is 51.

The square root of 957345981 is about 30941.0080798929. The cubic root of 957345981 is about 985.5749110139.

The spelling of 957345981 in words is "nine hundred fifty-seven million, three hundred forty-five thousand, nine hundred eighty-one".