111638013 has 16 divisors (see below), whose sum is σ = 151531200. Its totient is φ = 73092096.

The previous prime is 111638003. The next prime is 111638017. The reversal of 111638013 is 310836111.

It is not a de Polignac number, because 111638013 - 2²⁴ = 94860797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111638017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89631 + ... + 90867.

It is an arithmetic number, because the mean of its divisors is an integer number (9470700).

Almost surely, 2^111638013 is an apocalyptic number.

It is an amenable number.

111638013 is a deficient number, since it is larger than the sum of its proper divisors (39893187).

111638013 is a wasteful number, since it uses less digits than its factorization.

111638013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 111638013 is about 10565.8891249151. The cubic root of 111638013 is about 481.5085827304.

The spelling of 111638013 in words is "one hundred eleven million, six hundred thirty-eight thousand, thirteen".