91622657 has 8 divisors (see below), whose sum is σ = 105148032. Its totient is φ = 78206400.

The previous prime is 91622653. The next prime is 91622677. The reversal of 91622657 is 75622619.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91622657 - 2² = 91622653 is a prime.

It is a super-2 number, since 2×91622657² = 16789422551479298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91622657.

It is not an unprimeable number, because it can be changed into a prime (91622653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25469 + ... + 28842.

It is an arithmetic number, because the mean of its divisors is an integer number (13143504).

Almost surely, 2^91622657 is an apocalyptic number.

It is an amenable number.

91622657 is a deficient number, since it is larger than the sum of its proper divisors (13525375).

91622657 is a wasteful number, since it uses less digits than its factorization.

91622657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54559.

The product of its digits is 45360, while the sum is 38.

The square root of 91622657 is about 9571.9724717531. The cubic root of 91622657 is about 450.8177017194.

Subtracting from 91622657 its sum of digits (38), we obtain a palindrome (91622619).

The spelling of 91622657 in words is "ninety-one million, six hundred twenty-two thousand, six hundred fifty-seven".