91204465 has 16 divisors (see below), whose sum is σ = 125680320. Its totient is φ = 62838720.

The previous prime is 91204457. The next prime is 91204469. The reversal of 91204465 is 56440219.

It is not a de Polignac number, because 91204465 - 2³ = 91204457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91204469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42594 + ... + 44683.

It is an arithmetic number, because the mean of its divisors is an integer number (7855020).

Almost surely, 2^91204465 is an apocalyptic number.

91204465 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91204465 is a deficient number, since it is larger than the sum of its proper divisors (34475855).

91204465 is a wasteful number, since it uses less digits than its factorization.

91204465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87312.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 91204465 is about 9550.1028790270. The cubic root of 91204465 is about 450.1307685797.

It can be divided in two parts, 9120 and 4465, that multiplied together give a triangular number (40720800 = T₉₀₂₄).

The spelling of 91204465 in words is "ninety-one million, two hundred four thousand, four hundred sixty-five".