111381579 has 12 divisors (see below), whose sum is σ = 160983576. Its totient is φ = 74208672.

The previous prime is 111381577. The next prime is 111381583. The reversal of 111381579 is 975183111.

111381579 is a `hidden beast` number, since 1 + 1 + 1 + 3 + 81 + 579 = 666.

It is not a de Polignac number, because 111381579 - 2¹ = 111381577 is a prime.

It is a super-2 number, since 2×111381579² = 24811712281066482, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (111381577) 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 in 11 ways as a sum of consecutive naturals, for example, 18487 + ... + 23759.

It is an arithmetic number, because the mean of its divisors is an integer number (13415298).

Almost surely, 2^111381579 is an apocalyptic number.

111381579 is a deficient number, since it is larger than the sum of its proper divisors (49601997).

111381579 is a wasteful number, since it uses less digits than its factorization.

111381579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626 (or 7623 counting only the distinct ones).

The product of its digits is 7560, while the sum is 36.

The square root of 111381579 is about 10553.7471544471. The cubic root of 111381579 is about 481.1396228789.

The spelling of 111381579 in words is "one hundred eleven million, three hundred eighty-one thousand, five hundred seventy-nine".