91923392536831 has 2 divisors, whose sum is σ = 91923392536832. Its totient is φ = 91923392536830.

The previous prime is 91923392536817. The next prime is 91923392536837. The reversal of 91923392536831 is 13863529332919.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91923392536831 - 2⁹ = 91923392536319 is a prime.

It is a super-2 number, since 2×91923392536831² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91923392536837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45961696268415 + 45961696268416.

It is an arithmetic number, because the mean of its divisors is an integer number (45961696268416).

Almost surely, 2^{91923392536831} is an apocalyptic number.

91923392536831 is a deficient number, since it is larger than the sum of its proper divisors (1).

91923392536831 is an equidigital number, since it uses as much as digits as its factorization.

91923392536831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56687040, while the sum is 64.

The spelling of 91923392536831 in words is "ninety-one trillion, nine hundred twenty-three billion, three hundred ninety-two million, five hundred thirty-six thousand, eight hundred thirty-one".