105939439 has 4 divisors (see below), whose sum is σ = 105960256. Its totient is φ = 105918624.

The previous prime is 105939419. The next prime is 105939451. The reversal of 105939439 is 934939501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105939439 - 2²¹ = 103842287 is a prime.

It is a super-2 number, since 2×105939439² = 22446329471269442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105939395 and 105939404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105939419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2887 + ... + 14839.

It is an arithmetic number, because the mean of its divisors is an integer number (26490064).

Almost surely, 2^105939439 is an apocalyptic number.

105939439 is a deficient number, since it is larger than the sum of its proper divisors (20817).

105939439 is an equidigital number, since it uses as much as digits as its factorization.

105939439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20816.

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 105939439 is about 10292.6886186263. The cubic root of 105939439 is about 473.1722022572.

The spelling of 105939439 in words is "one hundred five million, nine hundred thirty-nine thousand, four hundred thirty-nine".