91041992 has 16 divisors (see below), whose sum is σ = 170818800. Its totient is φ = 45490320.

The previous prime is 91041983. The next prime is 91042013. The reversal of 91041992 is 29914019.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

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, 13259 + ... + 18917.

It is an arithmetic number, because the mean of its divisors is an integer number (10676175).

Almost surely, 2^91041992 is an apocalyptic number.

It is an amenable number.

91041992 is a deficient number, since it is larger than the sum of its proper divisors (79776808).

91041992 is a wasteful number, since it uses less digits than its factorization.

91041992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7676 (or 7672 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 91041992 is about 9541.5927391605. The cubic root of 91041992 is about 449.8633198067.

The spelling of 91041992 in words is "ninety-one million, forty-one thousand, nine hundred ninety-two".