91423875 has 32 divisors (see below), whose sum is σ = 161089344. Its totient is φ = 45888000.

The previous prime is 91423861. The next prime is 91423879. The reversal of 91423875 is 57832419.

It is not a de Polignac number, because 91423875 - 2²⁴ = 74646659 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (91423879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 796 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (5034042).

Almost surely, 2^91423875 is an apocalyptic number.

91423875 is a deficient number, since it is larger than the sum of its proper divisors (69665469).

91423875 is a wasteful number, since it uses less digits than its factorization.

91423875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14376 (or 14366 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 91423875 is about 9561.5832893930. The cubic root of 91423875 is about 450.4914384206.

The spelling of 91423875 in words is "ninety-one million, four hundred twenty-three thousand, eight hundred seventy-five".