115711961 has 2 divisors, whose sum is σ = 115711962. Its totient is φ = 115711960.

The previous prime is 115711949. The next prime is 115712017. The reversal of 115711961 is 169117511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93006736 + 22705225 = 9644^2 + 4765^2 .

It is a cyclic number.

It is not a de Polignac number, because 115711961 - 2¹⁰ = 115710937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (115711901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57855980 + 57855981.

It is an arithmetic number, because the mean of its divisors is an integer number (57855981).

Almost surely, 2^115711961 is an apocalyptic number.

It is an amenable number.

115711961 is a deficient number, since it is larger than the sum of its proper divisors (1).

115711961 is an equidigital number, since it uses as much as digits as its factorization.

115711961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 32.

The square root of 115711961 is about 10756.9494281604. The cubic root of 115711961 is about 487.2958931669.

The spelling of 115711961 in words is "one hundred fifteen million, seven hundred eleven thousand, nine hundred sixty-one".