91495879 has 2 divisors, whose sum is σ = 91495880. Its totient is φ = 91495878.

The previous prime is 91495867. The next prime is 91495897. The reversal of 91495879 is 97859419.

Together with next prime (91495897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91495879 - 2⁹ = 91495367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91495829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45747939 + 45747940.

It is an arithmetic number, because the mean of its divisors is an integer number (45747940).

Almost surely, 2^91495879 is an apocalyptic number.

91495879 is a deficient number, since it is larger than the sum of its proper divisors (1).

91495879 is an equidigital number, since it uses as much as digits as its factorization.

91495879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 52.

The square root of 91495879 is about 9565.3478243083. The cubic root of 91495879 is about 450.6096740331.

The spelling of 91495879 in words is "ninety-one million, four hundred ninety-five thousand, eight hundred seventy-nine".