91801036 has 12 divisors (see below), whose sum is σ = 161414680. Its totient is φ = 45682560.

The previous prime is 91801019. The next prime is 91801043. The reversal of 91801036 is 63010819.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 91800995 and 91801013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53541 + ... + 55228.

Almost surely, 2^91801036 is an apocalyptic number.

It is an amenable number.

91801036 is a deficient number, since it is larger than the sum of its proper divisors (69613644).

91801036 is a wasteful number, since it uses less digits than its factorization.

91801036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108984 (or 108982 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 91801036 is about 9581.2857174807. The cubic root of 91801036 is about 451.1100758351.

The spelling of 91801036 in words is "ninety-one million, eight hundred one thousand, thirty-six".