91392885 has 12 divisors (see below), whose sum is σ = 158414412. Its totient is φ = 48742848.

The previous prime is 91392881. The next prime is 91392911. The reversal of 91392885 is 58829319.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10284849 + 81108036 = 3207^2 + 9006^2 .

It is not a de Polignac number, because 91392885 - 2² = 91392881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2030953 = 91392885 / (9 + 1 + 3 + 9 + 2 + 8 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 91392885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91392881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1015432 + ... + 1015521.

It is an arithmetic number, because the mean of its divisors is an integer number (13201201).

Almost surely, 2^91392885 is an apocalyptic number.

It is an amenable number.

91392885 is a deficient number, since it is larger than the sum of its proper divisors (67021527).

91392885 is a wasteful number, since it uses less digits than its factorization.

91392885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030964 (or 2030961 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 91392885 is about 9559.9626045294. The cubic root of 91392885 is about 450.4405315599.

The spelling of 91392885 in words is "ninety-one million, three hundred ninety-two thousand, eight hundred eighty-five".