91497285 has 24 divisors (see below), whose sum is σ = 173013984. Its totient is φ = 44362080.

The previous prime is 91497283. The next prime is 91497299. The reversal of 91497285 is 58279419.

It is not a de Polignac number, because 91497285 - 2¹ = 91497283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 91497285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91497283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91927 + ... + 92916.

It is an arithmetic number, because the mean of its divisors is an integer number (7208916).

Almost surely, 2^91497285 is an apocalyptic number.

It is an amenable number.

91497285 is a deficient number, since it is larger than the sum of its proper divisors (81516699).

91497285 is a wasteful number, since it uses less digits than its factorization.

91497285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184865 (or 184862 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 91497285 is about 9565.4213184783. The cubic root of 91497285 is about 450.6119821660.

The spelling of 91497285 in words is "ninety-one million, four hundred ninety-seven thousand, two hundred eighty-five".