111972279 has 8 divisors (see below), whose sum is σ = 154112512. Its totient is φ = 72240120.

The previous prime is 111972233. The next prime is 111972281. The reversal of 111972279 is 972279111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111972279 - 2⁸ = 111972023 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 (111972079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601909 + ... + 602094.

It is an arithmetic number, because the mean of its divisors is an integer number (19264064).

Almost surely, 2^111972279 is an apocalyptic number.

111972279 is a deficient number, since it is larger than the sum of its proper divisors (42140233).

111972279 is a wasteful number, since it uses less digits than its factorization.

111972279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204037.

The product of its digits is 15876, while the sum is 39.

The square root of 111972279 is about 10581.6954690635. The cubic root of 111972279 is about 481.9886807716.

The spelling of 111972279 in words is "one hundred eleven million, nine hundred seventy-two thousand, two hundred seventy-nine".