91370399 has 8 divisors (see below), whose sum is σ = 94174080. Its totient is φ = 88597656.

The previous prime is 91370381. The next prime is 91370407. The reversal of 91370399 is 99307319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91370399 - 2⁸ = 91370143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91370309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1667 + ... + 13620.

It is an arithmetic number, because the mean of its divisors is an integer number (11771760).

Almost surely, 2^91370399 is an apocalyptic number.

91370399 is a deficient number, since it is larger than the sum of its proper divisors (2803681).

91370399 is a wasteful number, since it uses less digits than its factorization.

91370399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15469.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 91370399 is about 9558.7864815572. The cubic root of 91370399 is about 450.4035869021.

The spelling of 91370399 in words is "ninety-one million, three hundred seventy thousand, three hundred ninety-nine".