91200993 has 16 divisors (see below), whose sum is σ = 131132736. Its totient is φ = 56047680.

The previous prime is 91200983. The next prime is 91201031. The reversal of 91200993 is 39900219.

It is not a de Polignac number, because 91200993 - 2²⁶ = 24092129 is a prime.

It is a super-2 number, since 2×91200993² = 16635242248372098, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91200913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44671 + ... + 46667.

It is an arithmetic number, because the mean of its divisors is an integer number (8195796).

Almost surely, 2^91200993 is an apocalyptic number.

It is an amenable number.

91200993 is a deficient number, since it is larger than the sum of its proper divisors (39931743).

91200993 is a wasteful number, since it uses less digits than its factorization.

91200993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 91200993 is about 9549.9210991505. The cubic root of 91200993 is about 450.1250566011.

The spelling of 91200993 in words is "ninety-one million, two hundred thousand, nine hundred ninety-three".