91379039 has 2 divisors, whose sum is σ = 91379040. Its totient is φ = 91379038.

The previous prime is 91379033. The next prime is 91379053. The reversal of 91379039 is 93097319.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91379039 - 2²⁴ = 74601823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91378987 and 91379005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91379033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45689519 + 45689520.

It is an arithmetic number, because the mean of its divisors is an integer number (45689520).

Almost surely, 2^91379039 is an apocalyptic number.

91379039 is a deficient number, since it is larger than the sum of its proper divisors (1).

91379039 is an equidigital number, since it uses as much as digits as its factorization.

91379039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 91379039 is about 9559.2384110869. The cubic root of 91379039 is about 450.4177832005.

The spelling of 91379039 in words is "ninety-one million, three hundred seventy-nine thousand, thirty-nine".