91357249 has 4 divisors (see below), whose sum is σ = 91420336. Its totient is φ = 91294164.

The previous prime is 91357207. The next prime is 91357261. The reversal of 91357249 is 94275319.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91357249 - 2⁷ = 91357121 is a prime.

It is a super-2 number, since 2×91357249² = 16692293889696002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91357549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29319 + ... + 32284.

It is an arithmetic number, because the mean of its divisors is an integer number (22855084).

Almost surely, 2^91357249 is an apocalyptic number.

It is an amenable number.

91357249 is a deficient number, since it is larger than the sum of its proper divisors (63087).

91357249 is a wasteful number, since it uses less digits than its factorization.

91357249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63086.

The product of its digits is 68040, while the sum is 40.

The square root of 91357249 is about 9558.0986079868. The cubic root of 91357249 is about 450.3819785498.

It can be divided in two parts, 9135 and 7249, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 91357249 in words is "ninety-one million, three hundred fifty-seven thousand, two hundred forty-nine".