91423955 has 24 divisors (see below), whose sum is σ = 128969568. Its totient is φ = 62028288.

The previous prime is 91423897. The next prime is 91423961. The reversal of 91423955 is 55932419.

It is not a de Polignac number, because 91423955 - 2⁸ = 91423699 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21842 + ... + 25688.

It is an arithmetic number, because the mean of its divisors is an integer number (5373732).

Almost surely, 2^91423955 is an apocalyptic number.

91423955 is a deficient number, since it is larger than the sum of its proper divisors (37545613).

91423955 is a wasteful number, since it uses less digits than its factorization.

91423955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3963 (or 3956 counting only the distinct ones).

The product of its digits is 48600, while the sum is 38.

The square root of 91423955 is about 9561.5874727997. The cubic root of 91423955 is about 450.4915698206.

The spelling of 91423955 in words is "ninety-one million, four hundred twenty-three thousand, nine hundred fifty-five".