91364091 has 16 divisors (see below), whose sum is σ = 149931264. Its totient is φ = 48191904.

The previous prime is 91364089. The next prime is 91364101. The reversal of 91364091 is 19046319.

It is not a de Polignac number, because 91364091 - 2¹ = 91364089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91364071) 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, 167061 + ... + 167606.

It is an arithmetic number, because the mean of its divisors is an integer number (9370704).

Almost surely, 2^91364091 is an apocalyptic number.

91364091 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

91364091 is a deficient number, since it is larger than the sum of its proper divisors (58567173).

91364091 is a wasteful number, since it uses less digits than its factorization.

91364091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334690.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 91364091 is about 9558.4565176602. The cubic root of 91364091 is about 450.3932217246.

The spelling of 91364091 in words is "ninety-one million, three hundred sixty-four thousand, ninety-one".