91804168 has 16 divisors (see below), whose sum is σ = 172284480. Its totient is φ = 45861648.

The previous prime is 91804147. The next prime is 91804189. The reversal of 91804168 is 86140819.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91804147) and next prime (91804189).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6021 + ... + 14827.

It is an arithmetic number, because the mean of its divisors is an integer number (10767780).

Almost surely, 2^91804168 is an apocalyptic number.

91804168 is the 5122-nd centered heptagonal number.

It is an amenable number.

91804168 is a deficient number, since it is larger than the sum of its proper divisors (80480312).

91804168 is a wasteful number, since it uses less digits than its factorization.

91804168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10116 (or 10112 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 91804168 is about 9581.4491597044. The cubic root of 91804168 is about 451.1152059903.

The spelling of 91804168 in words is "ninety-one million, eight hundred four thousand, one hundred sixty-eight".