111986645 has 4 divisors (see below), whose sum is σ = 134383980. Its totient is φ = 89589312.

The previous prime is 111986593. The next prime is 111986657. The reversal of 111986645 is 546689111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546689111 = 17 ⋅32158183.

It can be written as a sum of positive squares in 2 ways, for example, as 39413284 + 72573361 = 6278^2 + 8519^2 .

It is a cyclic number.

It is not a de Polignac number, because 111986645 - 2²² = 107792341 is a prime.

It is a congruent number.

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, 11198660 + ... + 11198669.

It is an arithmetic number, because the mean of its divisors is an integer number (33595995).

Almost surely, 2^111986645 is an apocalyptic number.

It is an amenable number.

111986645 is a deficient number, since it is larger than the sum of its proper divisors (22397335).

111986645 is an equidigital number, since it uses as much as digits as its factorization.

111986645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22397334.

The product of its digits is 51840, while the sum is 41.

The square root of 111986645 is about 10582.3742610059. The cubic root of 111986645 is about 482.0092928771.

The spelling of 111986645 in words is "one hundred eleven million, nine hundred eighty-six thousand, six hundred forty-five".