91397700 has 72 divisors (see below), whose sum is σ = 293835360. Its totient is φ = 24372000.

The previous prime is 91397693. The next prime is 91397711. The reversal of 91397700 is 779319.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14226 + ... + 19625.

Almost surely, 2^91397700 is an apocalyptic number.

91397700 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91397700 is an abundant number, since it is smaller than the sum of its proper divisors (202437660).

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

91397700 is a wasteful number, since it uses less digits than its factorization.

91397700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33874 (or 33861 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 91397700 is about 9560.2144327416. The cubic root of 91397700 is about 450.4484418513.

The spelling of 91397700 in words is "ninety-one million, three hundred ninety-seven thousand, seven hundred".