111997636 has 6 divisors (see below), whose sum is σ = 195995870. Its totient is φ = 55998816.

The previous prime is 111997621. The next prime is 111997679. The reversal of 111997636 is 636799111.

It can be written as a sum of positive squares in only one way, i.e., 105185536 + 6812100 = 10256^2 + 2610^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111997592 and 111997601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13999701 + ... + 13999708.

Almost surely, 2^111997636 is an apocalyptic number.

It is an amenable number.

111997636 is a deficient number, since it is larger than the sum of its proper divisors (83998234).

111997636 is a wasteful number, since it uses less digits than its factorization.

111997636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27999413 (or 27999411 counting only the distinct ones).

The product of its digits is 61236, while the sum is 43.

The square root of 111997636 is about 10582.8935551672. The cubic root of 111997636 is about 482.0250613967.

Subtracting from 111997636 its product of digits (61236), we obtain a square (111936400 = 10580²).

The spelling of 111997636 in words is "one hundred eleven million, nine hundred ninety-seven thousand, six hundred thirty-six".