91477900 has 72 divisors (see below), whose sum is σ = 213986304. Its totient is φ = 33844800.

The previous prime is 91477879. The next prime is 91477909. The reversal of 91477900 is 977419.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 91477900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91477909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70659 + ... + 71941.

It is an arithmetic number, because the mean of its divisors is an integer number (2972032).

Almost surely, 2^91477900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91477900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106993152).

91477900 is an abundant number, since it is smaller than the sum of its proper divisors (122508404).

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

91477900 is a wasteful number, since it uses less digits than its factorization.

91477900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 91477900 is about 9564.4079795877. The cubic root of 91477900 is about 450.5801570679.

The spelling of 91477900 in words is "ninety-one million, four hundred seventy-seven thousand, nine hundred".