91504023 has 16 divisors (see below), whose sum is σ = 133872480. Its totient is φ = 55246464.

The previous prime is 91504009. The next prime is 91504031. The reversal of 91504023 is 32040519.

It is not a de Polignac number, because 91504023 - 2⁸ = 91503767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91503984 and 91504002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91504823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20068 + ... + 24201.

It is an arithmetic number, because the mean of its divisors is an integer number (8367030).

Almost surely, 2^91504023 is an apocalyptic number.

91504023 is a deficient number, since it is larger than the sum of its proper divisors (42368457).

91504023 is a wasteful number, since it uses less digits than its factorization.

91504023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44338.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 91504023 is about 9565.7735181218. The cubic root of 91504023 is about 450.6230431464.

The spelling of 91504023 in words is "ninety-one million, five hundred four thousand, twenty-three".