91864994 has 16 divisors (see below), whose sum is σ = 148558200. Its totient is φ = 42353280.

The previous prime is 91864937. The next prime is 91865009. The reversal of 91864994 is 49946819.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60918025 + 30946969 = 7805^2 + 5563^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 39134 + ... + 41414.

Almost surely, 2^91864994 is an apocalyptic number.

91864994 is a deficient number, since it is larger than the sum of its proper divisors (56693206).

91864994 is a wasteful number, since it uses less digits than its factorization.

91864994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845.

The product of its digits is 559872, while the sum is 50.

The square root of 91864994 is about 9584.6227886130. The cubic root of 91864994 is about 451.2148146690.

The spelling of 91864994 in words is "ninety-one million, eight hundred sixty-four thousand, nine hundred ninety-four".