91689325 has 48 divisors (see below), whose sum is σ = 143490816. Its totient is φ = 56563200.

The previous prime is 91689319. The next prime is 91689337. The reversal of 91689325 is 52398619.

It is a happy number.

It is not a de Polignac number, because 91689325 - 2¹⁷ = 91558253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92784 + ... + 93766.

It is an arithmetic number, because the mean of its divisors is an integer number (2989392).

Almost surely, 2^91689325 is an apocalyptic number.

It is an amenable number.

91689325 is a deficient number, since it is larger than the sum of its proper divisors (51801491).

91689325 is a wasteful number, since it uses less digits than its factorization.

91689325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1049 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 91689325 is about 9575.4542973167. The cubic root of 91689325 is about 450.9270190314.

The spelling of 91689325 in words is "ninety-one million, six hundred eighty-nine thousand, three hundred twenty-five".