91380925 has 24 divisors (see below), whose sum is σ = 117242496. Its totient is φ = 70611840.

The previous prime is 91380917. The next prime is 91380941. The reversal of 91380925 is 52908319.

91380925 = 1008² + 1009² + ... + 1090².

It is not a de Polignac number, because 91380925 - 2³ = 91380917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97057 + ... + 97993.

It is an arithmetic number, because the mean of its divisors is an integer number (4885104).

Almost surely, 2^91380925 is an apocalyptic number.

It is an amenable number.

91380925 is a deficient number, since it is larger than the sum of its proper divisors (25861571).

91380925 is a wasteful number, since it uses less digits than its factorization.

91380925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 91380925 is about 9559.3370586040. The cubic root of 91380925 is about 450.4208819494.

The spelling of 91380925 in words is "ninety-one million, three hundred eighty thousand, nine hundred twenty-five".