91364823 has 24 divisors (see below), whose sum is σ = 145716480. Its totient is φ = 54700560.

The previous prime is 91364813. The next prime is 91364837. The reversal of 91364823 is 32846319.

91364823 is a `hidden beast` number, since 9 + 1 + 3 + 648 + 2 + 3 = 666.

It is not a de Polignac number, because 91364823 - 2⁴ = 91364807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91364813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2658 + ... + 13776.

It is an arithmetic number, because the mean of its divisors is an integer number (6071520).

Almost surely, 2^91364823 is an apocalyptic number.

91364823 is a deficient number, since it is larger than the sum of its proper divisors (54351657).

91364823 is a wasteful number, since it uses less digits than its factorization.

91364823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11219 (or 11216 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 91364823 is about 9558.4948082844. The cubic root of 91364823 is about 450.3944245566.

The spelling of 91364823 in words is "ninety-one million, three hundred sixty-four thousand, eight hundred twenty-three".