111989559 has 8 divisors (see below), whose sum is σ = 162893952. Its totient is φ = 67872440.

The previous prime is 111989551. The next prime is 111989569. The reversal of 111989559 is 955989111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111989559 - 2³ = 111989551 is a prime.

It is a super-2 number, since 2×111989559² = 25083322650028962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111989551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1696779 + ... + 1696844.

It is an arithmetic number, because the mean of its divisors is an integer number (20361744).

Almost surely, 2^111989559 is an apocalyptic number.

111989559 is a deficient number, since it is larger than the sum of its proper divisors (50904393).

111989559 is a wasteful number, since it uses less digits than its factorization.

111989559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393637.

The product of its digits is 145800, while the sum is 48.

The square root of 111989559 is about 10582.5119418784. The cubic root of 111989559 is about 482.0134736223.

The spelling of 111989559 in words is "one hundred eleven million, nine hundred eighty-nine thousand, five hundred fifty-nine".