111621379 has 2 divisors, whose sum is σ = 111621380. Its totient is φ = 111621378.

The previous prime is 111621373. The next prime is 111621403. The reversal of 111621379 is 973126111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111621379 - 2¹⁷ = 111490307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111621379.

It is not a weakly prime, because it can be changed into another prime (111621373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55810689 + 55810690.

It is an arithmetic number, because the mean of its divisors is an integer number (55810690).

Almost surely, 2^111621379 is an apocalyptic number.

111621379 is a deficient number, since it is larger than the sum of its proper divisors (1).

111621379 is an equidigital number, since it uses as much as digits as its factorization.

111621379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 31.

The square root of 111621379 is about 10565.1019398773. The cubic root of 111621379 is about 481.4846667082.

The spelling of 111621379 in words is "one hundred eleven million, six hundred twenty-one thousand, three hundred seventy-nine".