91389700 has 36 divisors (see below), whose sum is σ = 199613092. Its totient is φ = 36316800.

The previous prime is 91389691. The next prime is 91389713. The reversal of 91389700 is 798319.

It can be written as a sum of positive squares in 6 ways, for example, as 148996 + 91240704 = 386^2 + 9552^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 91389700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12790 + ... + 18610.

Almost surely, 2^91389700 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 91389700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99806546).

91389700 is an abundant number, since it is smaller than the sum of its proper divisors (108223392).

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

91389700 is a wasteful number, since it uses less digits than its factorization.

91389700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5992 (or 5985 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 91389700 is about 9559.7960229285. The cubic root of 91389700 is about 450.4352989507.

The spelling of 91389700 in words is "ninety-one million, three hundred eighty-nine thousand, seven hundred".