91379825 has 24 divisors (see below), whose sum is σ = 117159168. Its totient is φ = 70649280.

The previous prime is 91379803. The next prime is 91379831. The reversal of 91379825 is 52897319.

It is not a de Polignac number, because 91379825 - 2²² = 87185521 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206054 + ... + 206496.

It is an arithmetic number, because the mean of its divisors is an integer number (4881632).

Almost surely, 2^91379825 is an apocalyptic number.

It is an amenable number.

91379825 is a deficient number, since it is larger than the sum of its proper divisors (25779343).

91379825 is a wasteful number, since it uses less digits than its factorization.

91379825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 708 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 91379825 is about 9559.2795230603. The cubic root of 91379825 is about 450.4190746249.

The spelling of 91379825 in words is "ninety-one million, three hundred seventy-nine thousand, eight hundred twenty-five".