111380279 has 2 divisors, whose sum is σ = 111380280. Its totient is φ = 111380278.

The previous prime is 111380267. The next prime is 111380351. The reversal of 111380279 is 972083111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111380279 - 2¹² = 111376183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111380219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55690139 + 55690140.

It is an arithmetic number, because the mean of its divisors is an integer number (55690140).

Almost surely, 2^111380279 is an apocalyptic number.

111380279 is a deficient number, since it is larger than the sum of its proper divisors (1).

111380279 is an equidigital number, since it uses as much as digits as its factorization.

111380279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 111380279 is about 10553.6855647684. The cubic root of 111380279 is about 481.1377509836.

The spelling of 111380279 in words is "one hundred eleven million, three hundred eighty thousand, two hundred seventy-nine".