91625438 has 8 divisors (see below), whose sum is σ = 137494920. Its totient is φ = 45793800.

The previous prime is 91625437. The next prime is 91625459. The reversal of 91625438 is 83452619.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91625437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2333 + ... + 13736.

It is an arithmetic number, because the mean of its divisors is an integer number (17186865).

Almost surely, 2^91625438 is an apocalyptic number.

91625438 is a deficient number, since it is larger than the sum of its proper divisors (45869482).

91625438 is a wasteful number, since it uses less digits than its factorization.

91625438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18922.

The product of its digits is 51840, while the sum is 38.

The square root of 91625438 is about 9572.1177385153. The cubic root of 91625438 is about 450.8222628595.

The spelling of 91625438 in words is "ninety-one million, six hundred twenty-five thousand, four hundred thirty-eight".