111660139 has 2 divisors, whose sum is σ = 111660140. Its totient is φ = 111660138.

The previous prime is 111660103. The next prime is 111660163. The reversal of 111660139 is 931066111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111660139 - 2⁷ = 111660011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111660839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55830069 + 55830070.

It is an arithmetic number, because the mean of its divisors is an integer number (55830070).

Almost surely, 2^111660139 is an apocalyptic number.

111660139 is a deficient number, since it is larger than the sum of its proper divisors (1).

111660139 is an equidigital number, since it uses as much as digits as its factorization.

111660139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 111660139 is about 10566.9361216958. The cubic root of 111660139 is about 481.5403913556.

The spelling of 111660139 in words is "one hundred eleven million, six hundred sixty thousand, one hundred thirty-nine".