111779387 has 4 divisors (see below), whose sum is σ = 111815760. Its totient is φ = 111743016.

The previous prime is 111779363. The next prime is 111779399. The reversal of 111779387 is 783977111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111779387 - 2¹⁸ = 111517243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111779687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13103 + ... + 19880.

It is an arithmetic number, because the mean of its divisors is an integer number (27953940).

Almost surely, 2^111779387 is an apocalyptic number.

111779387 is a deficient number, since it is larger than the sum of its proper divisors (36373).

111779387 is an equidigital number, since it uses as much as digits as its factorization.

111779387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36372.

The product of its digits is 74088, while the sum is 44.

The square root of 111779387 is about 10572.5771219698. The cubic root of 111779387 is about 481.7117515193.

The spelling of 111779387 in words is "one hundred eleven million, seven hundred seventy-nine thousand, three hundred eighty-seven".