111680613 has 56 divisors (see below), whose sum is σ = 192542880. Its totient is φ = 64035360.

The previous prime is 111680609. The next prime is 111680623. The reversal of 111680613 is 316086111.

It is not a de Polignac number, because 111680613 - 2² = 111680609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111680603) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 151995 + ... + 152727.

Almost surely, 2^111680613 is an apocalyptic number.

It is an amenable number.

111680613 is a deficient number, since it is larger than the sum of its proper divisors (80862267).

111680613 is an equidigital number, since it uses as much as digits as its factorization.

111680613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 111680613 is about 10567.9048538488. The cubic root of 111680613 is about 481.5698213012.

The spelling of 111680613 in words is "one hundred eleven million, six hundred eighty thousand, six hundred thirteen".