105612139 has 2 divisors, whose sum is σ = 105612140. Its totient is φ = 105612138.

The previous prime is 105612083. The next prime is 105612151. The reversal of 105612139 is 931216501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105612139 - 2⁷ = 105612011 is a prime.

It is a super-2 number, since 2×105612139² = 22307847808310642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105612539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52806069 + 52806070.

It is an arithmetic number, because the mean of its divisors is an integer number (52806070).

Almost surely, 2^105612139 is an apocalyptic number.

105612139 is a deficient number, since it is larger than the sum of its proper divisors (1).

105612139 is an equidigital number, since it uses as much as digits as its factorization.

105612139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 105612139 is about 10276.7766833769. The cubic root of 105612139 is about 472.6844109079.

The spelling of 105612139 in words is "one hundred five million, six hundred twelve thousand, one hundred thirty-nine".