91325623 has 4 divisors (see below), whose sum is σ = 92688760. Its totient is φ = 89962488.

The previous prime is 91325603. The next prime is 91325629. The reversal of 91325623 is 32652319.

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

It is a cyclic number.

It is not a de Polignac number, because 91325623 - 2²¹ = 89228471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91325629) 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, 681468 + ... + 681601.

It is an arithmetic number, because the mean of its divisors is an integer number (23172190).

Almost surely, 2^91325623 is an apocalyptic number.

91325623 is a deficient number, since it is larger than the sum of its proper divisors (1363137).

91325623 is a wasteful number, since it uses less digits than its factorization.

91325623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363136.

The product of its digits is 9720, while the sum is 31.

The square root of 91325623 is about 9556.4440562377. Note that the first 3 decimals coincide. The cubic root of 91325623 is about 450.3300015600.

The spelling of 91325623 in words is "ninety-one million, three hundred twenty-five thousand, six hundred twenty-three".