105123939 has 8 divisors (see below), whose sum is σ = 140870400. Its totient is φ = 69730056.

The previous prime is 105123841. The next prime is 105123943. The reversal of 105123939 is 939321501.

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

It is not a de Polignac number, because 105123939 - 2¹⁵ = 105091171 is a prime.

It is a super-2 number, since 2×105123939² = 22102085101751442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105123839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87447 + ... + 88640.

It is an arithmetic number, because the mean of its divisors is an integer number (17608800).

Almost surely, 2^105123939 is an apocalyptic number.

105123939 is a deficient number, since it is larger than the sum of its proper divisors (35746461).

105123939 is a wasteful number, since it uses less digits than its factorization.

105123939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176289.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 105123939 is about 10252.9965863644. The cubic root of 105123939 is about 471.9549460850.

The spelling of 105123939 in words is "one hundred five million, one hundred twenty-three thousand, nine hundred thirty-nine".