91320465 has 16 divisors (see below), whose sum is σ = 152466048. Its totient is φ = 46586496.

The previous prime is 91320371. The next prime is 91320469. The reversal of 91320465 is 56402319.

It is not a de Polignac number, because 91320465 - 2¹⁵ = 91287697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91320469) 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, 132004 + ... + 132693.

It is an arithmetic number, because the mean of its divisors is an integer number (9529128).

Almost surely, 2^91320465 is an apocalyptic number.

It is an amenable number.

91320465 is a deficient number, since it is larger than the sum of its proper divisors (61145583).

91320465 is a wasteful number, since it uses less digits than its factorization.

91320465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264728.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 91320465 is about 9556.1741821714. The cubic root of 91320465 is about 450.3215233045.

The spelling of 91320465 in words is "ninety-one million, three hundred twenty thousand, four hundred sixty-five".