105608639 has 2 divisors, whose sum is σ = 105608640. Its totient is φ = 105608638.

The previous prime is 105608623. The next prime is 105608647. The reversal of 105608639 is 936806501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105608639 - 2⁴ = 105608623 is a prime.

It is a super-2 number, since 2×105608639² = 22306369262864642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105608689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52804319 + 52804320.

It is an arithmetic number, because the mean of its divisors is an integer number (52804320).

Almost surely, 2^105608639 is an apocalyptic number.

105608639 is a deficient number, since it is larger than the sum of its proper divisors (1).

105608639 is an equidigital number, since it uses as much as digits as its factorization.

105608639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 105608639 is about 10276.6063951092. The cubic root of 105608639 is about 472.6791892426.

The spelling of 105608639 in words is "one hundred five million, six hundred eight thousand, six hundred thirty-nine".