91256929867 has 2 divisors, whose sum is σ = 91256929868. Its totient is φ = 91256929866.

The previous prime is 91256929837. The next prime is 91256929877. The reversal of 91256929867 is 76892965219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91256929867 - 2²³ = 91248541259 is a prime.

It is a super-3 number, since 3×91256929867³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91256929799 and 91256929808.

It is not a weakly prime, because it can be changed into another prime (91256929837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45628464933 + 45628464934.

It is an arithmetic number, because the mean of its divisors is an integer number (45628464934).

Almost surely, 2^91256929867 is an apocalyptic number.

91256929867 is a deficient number, since it is larger than the sum of its proper divisors (1).

91256929867 is an equidigital number, since it uses as much as digits as its factorization.

91256929867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 64.

The spelling of 91256929867 in words is "ninety-one billion, two hundred fifty-six million, nine hundred twenty-nine thousand, eight hundred sixty-seven".