91577994 has 8 divisors (see below), whose sum is σ = 183156000. Its totient is φ = 30525996.

The previous prime is 91577987. The next prime is 91578017. The reversal of 91577994 is 49977519.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

91577994 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7631494 + ... + 7631505.

It is an arithmetic number, because the mean of its divisors is an integer number (22894500).

Almost surely, 2^91577994 is an apocalyptic number.

91577994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

91577994 is a wasteful number, since it uses less digits than its factorization.

91577994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15263004.

The product of its digits is 714420, while the sum is 51.

The square root of 91577994 is about 9569.6391781509. The cubic root of 91577994 is about 450.7444369315.

The spelling of 91577994 in words is "ninety-one million, five hundred seventy-seven thousand, nine hundred ninety-four".