111638479 has 8 divisors (see below), whose sum is σ = 113895488. Its totient is φ = 109395360.

The previous prime is 111638477. The next prime is 111638519. The reversal of 111638479 is 974836111.

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 111638479 - 2¹ = 111638477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111638477) 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 7 ways as a sum of consecutive naturals, for example, 13594 + ... + 20200.

It is an arithmetic number, because the mean of its divisors is an integer number (14236936).

Almost surely, 2^111638479 is an apocalyptic number.

111638479 is a deficient number, since it is larger than the sum of its proper divisors (2257009).

111638479 is an equidigital number, since it uses as much as digits as its factorization.

111638479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6945.

The product of its digits is 36288, while the sum is 40.

The square root of 111638479 is about 10565.9111769880. The cubic root of 111638479 is about 481.5092527014.

The spelling of 111638479 in words is "one hundred eleven million, six hundred thirty-eight thousand, four hundred seventy-nine".