91837225 has 6 divisors (see below), whose sum is σ = 113878190. Its totient is φ = 73469760.

The previous prime is 91837199. The next prime is 91837243. The reversal of 91837225 is 52273819.

It can be written as a sum of positive squares in 3 ways, for example, as 10621081 + 81216144 = 3259^2 + 9012^2 .

It is not a de Polignac number, because 91837225 - 2⁹ = 91836713 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1836720 + ... + 1836769.

Almost surely, 2^91837225 is an apocalyptic number.

It is an amenable number.

91837225 is a deficient number, since it is larger than the sum of its proper divisors (22040965).

91837225 is a wasteful number, since it uses less digits than its factorization.

91837225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673499 (or 3673494 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 91837225 is about 9583.1740566474. The cubic root of 91837225 is about 451.1693456012.

The spelling of 91837225 in words is "ninety-one million, eight hundred thirty-seven thousand, two hundred twenty-five".