91916329031 has 2 divisors, whose sum is σ = 91916329032. Its totient is φ = 91916329030.

The previous prime is 91916328947. The next prime is 91916329039. The reversal of 91916329031 is 13092361919.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91916329031 is a prime.

It is a super-2 number, since 2×91916329031² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91916329039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45958164515 + 45958164516.

It is an arithmetic number, because the mean of its divisors is an integer number (45958164516).

Almost surely, 2^91916329031 is an apocalyptic number.

91916329031 is a deficient number, since it is larger than the sum of its proper divisors (1).

91916329031 is an equidigital number, since it uses as much as digits as its factorization.

91916329031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 44.

The spelling of 91916329031 in words is "ninety-one billion, nine hundred sixteen million, three hundred twenty-nine thousand, thirty-one".