91284925 has 12 divisors (see below), whose sum is σ = 116845696. Its totient is φ = 70671600.

The previous prime is 91284923. The next prime is 91284929. The reversal of 91284925 is 52948219.

It is not a de Polignac number, because 91284925 - 2¹ = 91284923 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91284923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58119 + ... + 59668.

Almost surely, 2^91284925 is an apocalyptic number.

It is an amenable number.

91284925 is a deficient number, since it is larger than the sum of its proper divisors (25560771).

91284925 is a wasteful number, since it uses less digits than its factorization.

91284925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117828 (or 117823 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 91284925 is about 9554.3144704369. The cubic root of 91284925 is about 450.2630971763.

The spelling of 91284925 in words is "ninety-one million, two hundred eighty-four thousand, nine hundred twenty-five".