91137025 has 24 divisors (see below), whose sum is σ = 129852800. Its totient is φ = 62156160.

The previous prime is 91137023. The next prime is 91137041. The reversal of 91137025 is 52073119.

It is not a de Polignac number, because 91137025 - 2¹ = 91137023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91136984 and 91137002.

It is not an unprimeable number, because it can be changed into a prime (91137023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33517 + ... + 36133.

Almost surely, 2^91137025 is an apocalyptic number.

It is an amenable number.

91137025 is a deficient number, since it is larger than the sum of its proper divisors (38715775).

91137025 is a wasteful number, since it uses less digits than its factorization.

91137025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833 (or 2828 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 91137025 is about 9546.5713740589. The cubic root of 91137025 is about 450.0197933681.

The spelling of 91137025 in words is "ninety-one million, one hundred thirty-seven thousand, twenty-five".