105939689 has 2 divisors, whose sum is σ = 105939690. Its totient is φ = 105939688.

The previous prime is 105939677. The next prime is 105939703. The reversal of 105939689 is 986939501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90573289 + 15366400 = 9517^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 105939689 - 2²⁴ = 89162473 is a prime.

It is a super-2 number, since 2×105939689² = 22446435410833442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105939629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52969844 + 52969845.

It is an arithmetic number, because the mean of its divisors is an integer number (52969845).

Almost surely, 2^105939689 is an apocalyptic number.

It is an amenable number.

105939689 is a deficient number, since it is larger than the sum of its proper divisors (1).

105939689 is an equidigital number, since it uses as much as digits as its factorization.

105939689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 105939689 is about 10292.7007631622. The cubic root of 105939689 is about 473.1725744603.

The spelling of 105939689 in words is "one hundred five million, nine hundred thirty-nine thousand, six hundred eighty-nine".