91680054 has 16 divisors (see below), whose sum is σ = 193010880. Its totient is φ = 28951560.

The previous prime is 91680037. The next prime is 91680067. The reversal of 91680054 is 45008619.

It is a junction number, because it is equal to n+sod(n) for n = 91679997 and 91680024.

It is a congruent number.

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, 401992 + ... + 402219.

It is an arithmetic number, because the mean of its divisors is an integer number (12063180).

Almost surely, 2^91680054 is an apocalyptic number.

91680054 is an abundant number, since it is smaller than the sum of its proper divisors (101330826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91680054 is a wasteful number, since it uses less digits than its factorization.

91680054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804235.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 91680054 is about 9574.9701827212. The cubic root of 91680054 is about 450.9118202962.

The spelling of 91680054 in words is "ninety-one million, six hundred eighty thousand, fifty-four".