91684394 has 16 divisors (see below), whose sum is σ = 143942400. Its totient is φ = 43715760.

The previous prime is 91684387. The next prime is 91684421. The reversal of 91684394 is 49348619.

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, 13199 + ... + 18909.

It is an arithmetic number, because the mean of its divisors is an integer number (8996400).

Almost surely, 2^91684394 is an apocalyptic number.

91684394 is a deficient number, since it is larger than the sum of its proper divisors (52258006).

91684394 is a wasteful number, since it uses less digits than its factorization.

91684394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6085.

The product of its digits is 186624, while the sum is 44.

The square root of 91684394 is about 9575.1968125987. The cubic root of 91684394 is about 450.9189353532.

The spelling of 91684394 in words is "ninety-one million, six hundred eighty-four thousand, three hundred ninety-four".