91168874 has 4 divisors (see below), whose sum is σ = 136753314. Its totient is φ = 45584436.

The previous prime is 91168873. The next prime is 91168877. The reversal of 91168874 is 47886119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47886119 = 719 ⋅66601.

It can be written as a sum of positive squares in only one way, i.e., 58599025 + 32569849 = 7655^2 + 5707^2 .

It is not an unprimeable number, because it can be changed into a prime (91168873) 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 as a sum of consecutive naturals, namely, 22792217 + ... + 22792220.

Almost surely, 2^91168874 is an apocalyptic number.

91168874 is a deficient number, since it is larger than the sum of its proper divisors (45584440).

91168874 is a wasteful number, since it uses less digits than its factorization.

91168874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45584439.

The product of its digits is 96768, while the sum is 44.

The square root of 91168874 is about 9548.2393141354. The cubic root of 91168874 is about 450.0722089885.

The spelling of 91168874 in words is "ninety-one million, one hundred sixty-eight thousand, eight hundred seventy-four".