91426640927 has 2 divisors, whose sum is σ = 91426640928. Its totient is φ = 91426640926.

The previous prime is 91426640909. The next prime is 91426640953. The reversal of 91426640927 is 72904662419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91426640927 - 2²⁶ = 91359532063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91426640957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45713320463 + 45713320464.

It is an arithmetic number, because the mean of its divisors is an integer number (45713320464).

Almost surely, 2^91426640927 is an apocalyptic number.

91426640927 is a deficient number, since it is larger than the sum of its proper divisors (1).

91426640927 is an equidigital number, since it uses as much as digits as its factorization.

91426640927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 91426640927 in words is "ninety-one billion, four hundred twenty-six million, six hundred forty thousand, nine hundred twenty-seven".