91442236 has 6 divisors (see below), whose sum is σ = 160023920. Its totient is φ = 45721116.

The previous prime is 91442161. The next prime is 91442237. The reversal of 91442236 is 63224419.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 91442198 and 91442207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91442237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11430276 + ... + 11430283.

Almost surely, 2^91442236 is an apocalyptic number.

It is an amenable number.

91442236 is a deficient number, since it is larger than the sum of its proper divisors (68581684).

91442236 is a wasteful number, since it uses less digits than its factorization.

91442236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22860563 (or 22860561 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 91442236 is about 9562.5433855225. The cubic root of 91442236 is about 450.5215943641.

The spelling of 91442236 in words is "ninety-one million, four hundred forty-two thousand, two hundred thirty-six".