105399239 has 16 divisors (see below), whose sum is σ = 118056960. Its totient is φ = 93276960.

The previous prime is 105399209. The next prime is 105399247. The reversal of 105399239 is 932993501.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105399239 is a prime.

It is a super-2 number, since 2×105399239² = 22217999163558242, 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 = 105399196 and 105399205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105399209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123137 + ... + 123989.

It is an arithmetic number, because the mean of its divisors is an integer number (7378560).

Almost surely, 2^105399239 is an apocalyptic number.

105399239 is a deficient number, since it is larger than the sum of its proper divisors (12657721).

105399239 is a wasteful number, since it uses less digits than its factorization.

105399239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 105399239 is about 10266.4131516319. The cubic root of 105399239 is about 472.3665743101.

It can be divided in two parts, 105399 and 239, that multiplied together give a square (25190361 = 5019²).

The spelling of 105399239 in words is "one hundred five million, three hundred ninety-nine thousand, two hundred thirty-nine".