105900139 has 2 divisors, whose sum is σ = 105900140. Its totient is φ = 105900138.

The previous prime is 105900127. The next prime is 105900161. The reversal of 105900139 is 931009501.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105900139 is a prime.

It is a super-2 number, since 2×105900139² = 22429678880438642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105900239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52950069 + 52950070.

It is an arithmetic number, because the mean of its divisors is an integer number (52950070).

Almost surely, 2^105900139 is an apocalyptic number.

105900139 is a deficient number, since it is larger than the sum of its proper divisors (1).

105900139 is an equidigital number, since it uses as much as digits as its factorization.

105900139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 105900139 is about 10290.7793193713. The cubic root of 105900139 is about 473.1136846499.

The spelling of 105900139 in words is "one hundred five million, nine hundred thousand, one hundred thirty-nine".