91418873 has 16 divisors (see below), whose sum is σ = 113277696. Its totient is φ = 71841600.

The previous prime is 91418851. The next prime is 91418891. The reversal of 91418873 is 37881419.

It is a cyclic number.

It is not a de Polignac number, because 91418873 - 2⁸ = 91418617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91418873.

It is not an unprimeable number, because it can be changed into a prime (91418893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10415 + ... + 17067.

It is an arithmetic number, because the mean of its divisors is an integer number (7079856).

Almost surely, 2^91418873 is an apocalyptic number.

It is an amenable number.

91418873 is a deficient number, since it is larger than the sum of its proper divisors (21858823).

91418873 is a wasteful number, since it uses less digits than its factorization.

91418873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6824.

The product of its digits is 48384, while the sum is 41.

The square root of 91418873 is about 9561.3217182563. The cubic root of 91418873 is about 450.4832224803.

The spelling of 91418873 in words is "ninety-one million, four hundred eighteen thousand, eight hundred seventy-three".