91364231 has 4 divisors (see below), whose sum is σ = 104416272. Its totient is φ = 78312192.

The previous prime is 91364201. The next prime is 91364233. The reversal of 91364231 is 13246319.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 91364231 - 2¹⁴ = 91347847 is a prime.

It is a super-2 number, since 2×91364231² = 16694845412442722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91364194 and 91364203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91364233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6526010 + ... + 6526023.

It is an arithmetic number, because the mean of its divisors is an integer number (26104068).

Almost surely, 2^91364231 is an apocalyptic number.

91364231 is a deficient number, since it is larger than the sum of its proper divisors (13052041).

91364231 is a wasteful number, since it uses less digits than its factorization.

91364231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13052040.

The product of its digits is 3888, while the sum is 29.

The square root of 91364231 is about 9558.4638410155. The cubic root of 91364231 is about 450.3934517750.

The spelling of 91364231 in words is "ninety-one million, three hundred sixty-four thousand, two hundred thirty-one".