91139092 has 12 divisors (see below), whose sum is σ = 173992896. Its totient is φ = 41426840.

The previous prime is 91139071. The next prime is 91139093. The reversal of 91139092 is 29093119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91139093) 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 3 ways as a sum of consecutive naturals, for example, 1035628 + ... + 1035715.

It is an arithmetic number, because the mean of its divisors is an integer number (14499408).

Almost surely, 2^91139092 is an apocalyptic number.

It is an amenable number.

91139092 is a deficient number, since it is larger than the sum of its proper divisors (82853804).

91139092 is a wasteful number, since it uses less digits than its factorization.

91139092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071358 (or 2071356 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 91139092 is about 9546.6796322072. The cubic root of 91139092 is about 450.0231955122.

The spelling of 91139092 in words is "ninety-one million, one hundred thirty-nine thousand, ninety-two".