105139879 has 8 divisors (see below), whose sum is σ = 116880512. Its totient is φ = 93921120.

The previous prime is 105139873. The next prime is 105139897. The reversal of 105139879 is 978931501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105139879 - 2⁵ = 105139847 is a prime.

It is a super-2 number, since 2×105139879² = 22108788312269282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105139873) 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 7 ways as a sum of consecutive naturals, for example, 130044 + ... + 130849.

It is an arithmetic number, because the mean of its divisors is an integer number (14610064).

Almost surely, 2^105139879 is an apocalyptic number.

105139879 is a deficient number, since it is larger than the sum of its proper divisors (11740633).

105139879 is a wasteful number, since it uses less digits than its factorization.

105139879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260937.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 105139879 is about 10253.7738906219. The cubic root of 105139879 is about 471.9787991411.

The spelling of 105139879 in words is "one hundred five million, one hundred thirty-nine thousand, eight hundred seventy-nine".