91706011961 has 2 divisors, whose sum is σ = 91706011962. Its totient is φ = 91706011960.

The previous prime is 91706011951. The next prime is 91706011967. The reversal of 91706011961 is 16911060719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89628384400 + 2077627561 = 299380^2 + 45581^2 .

It is a cyclic number.

It is not a de Polignac number, because 91706011961 - 2⁶ = 91706011897 is a prime.

It is not a weakly prime, because it can be changed into another prime (91706011967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45853005980 + 45853005981.

It is an arithmetic number, because the mean of its divisors is an integer number (45853005981).

Almost surely, 2^91706011961 is an apocalyptic number.

It is an amenable number.

91706011961 is a deficient number, since it is larger than the sum of its proper divisors (1).

91706011961 is an equidigital number, since it uses as much as digits as its factorization.

91706011961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 91706011961 in words is "ninety-one billion, seven hundred six million, eleven thousand, nine hundred sixty-one".