91113837 has 16 divisors (see below), whose sum is σ = 124104960. Its totient is φ = 59438912.

The previous prime is 91113811. The next prime is 91113859. The reversal of 91113837 is 73831119.

It is a cyclic number.

It is not a de Polignac number, because 91113837 - 2⁶ = 91113773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91113798 and 91113807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91113437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113923 + ... + 114719.

It is an arithmetic number, because the mean of its divisors is an integer number (7756560).

Almost surely, 2^91113837 is an apocalyptic number.

It is an amenable number.

91113837 is a deficient number, since it is larger than the sum of its proper divisors (32991123).

91113837 is a wasteful number, since it uses less digits than its factorization.

91113837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its digits is 4536, while the sum is 33.

The square root of 91113837 is about 9545.3568293700. The cubic root of 91113837 is about 449.9816239410.

The spelling of 91113837 in words is "ninety-one million, one hundred thirteen thousand, eight hundred thirty-seven".