91367899 has 12 divisors (see below), whose sum is σ = 106453200. Its totient is φ = 78191568.

The previous prime is 91367879. The next prime is 91367909. The reversal of 91367899 is 99876319.

It is not a de Polignac number, because 91367899 - 2⁹ = 91367387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91367839) 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, 44017 + ... + 46045.

It is an arithmetic number, because the mean of its divisors is an integer number (8871100).

Almost surely, 2^91367899 is an apocalyptic number.

91367899 is a deficient number, since it is larger than the sum of its proper divisors (15085301).

91367899 is a wasteful number, since it uses less digits than its factorization.

91367899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962 (or 2955 counting only the distinct ones).

The product of its digits is 734832, while the sum is 52.

The square root of 91367899 is about 9558.6557109250. The cubic root of 91367899 is about 450.3994790100.

The spelling of 91367899 in words is "ninety-one million, three hundred sixty-seven thousand, eight hundred ninety-nine".