91948089 has 16 divisors (see below), whose sum is σ = 128149632. Its totient is φ = 58531968.

The previous prime is 91948081. The next prime is 91948123. The reversal of 91948089 is 98084919.

It is not a de Polignac number, because 91948089 - 2³ = 91948081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91948081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76477 + ... + 77669.

It is an arithmetic number, because the mean of its divisors is an integer number (8009352).

Almost surely, 2^91948089 is an apocalyptic number.

It is an amenable number.

91948089 is a deficient number, since it is larger than the sum of its proper divisors (36201543).

91948089 is a wasteful number, since it uses less digits than its factorization.

91948089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 91948089 is about 9588.9566168588. The cubic root of 91948089 is about 451.3508200333.

The spelling of 91948089 in words is "ninety-one million, nine hundred forty-eight thousand, eighty-nine".