9131965657 has 2 divisors, whose sum is σ = 9131965658. Its totient is φ = 9131965656.

The previous prime is 9131965637. The next prime is 9131965673. The reversal of 9131965657 is 7565691319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8997660736 + 134304921 = 94856^2 + 11589^2 .

It is a cyclic number.

It is not a de Polignac number, because 9131965657 - 2¹⁹ = 9131441369 is a prime.

It is not a weakly prime, because it can be changed into another prime (9131965637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4565982828 + 4565982829.

It is an arithmetic number, because the mean of its divisors is an integer number (4565982829).

Almost surely, 2^9131965657 is an apocalyptic number.

It is an amenable number.

9131965657 is a deficient number, since it is larger than the sum of its proper divisors (1).

9131965657 is an equidigital number, since it uses as much as digits as its factorization.

9131965657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 52.

The square root of 9131965657 is about 95561.3188324648. The cubic root of 9131965657 is about 2090.2011861151.

The spelling of 9131965657 in words is "nine billion, one hundred thirty-one million, nine hundred sixty-five thousand, six hundred fifty-seven".