91049233 has 12 divisors (see below), whose sum is σ = 102525444. Its totient is φ = 80748800.

The previous prime is 91049207. The next prime is 91049239. The reversal of 91049233 is 33294019.

It can be written as a sum of positive squares in 2 ways, for example, as 3214849 + 87834384 = 1793^2 + 9372^2 .

It is a de Polignac number, because none of the positive numbers 2^k-91049233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91049195 and 91049204.

It is not an unprimeable number, because it can be changed into a prime (91049239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4216 + ... + 14137.

It is an arithmetic number, because the mean of its divisors is an integer number (8543787).

Almost surely, 2^91049233 is an apocalyptic number.

It is an amenable number.

91049233 is a deficient number, since it is larger than the sum of its proper divisors (11476211).

91049233 is a wasteful number, since it uses less digits than its factorization.

91049233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18416 (or 18405 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 91049233 is about 9541.9721756040. The cubic root of 91049233 is about 449.8752460760.

The spelling of 91049233 in words is "ninety-one million, forty-nine thousand, two hundred thirty-three".