123995879 has 4 divisors (see below), whose sum is σ = 141709584. Its totient is φ = 106282176.

The previous prime is 123995873. The next prime is 123995897. The reversal of 123995879 is 978599321.

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

It is not a de Polignac number, because 123995879 - 2¹² = 123991783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123995879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123995873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8856842 + ... + 8856855.

It is an arithmetic number, because the mean of its divisors is an integer number (35427396).

Almost surely, 2^123995879 is an apocalyptic number.

123995879 is a deficient number, since it is larger than the sum of its proper divisors (17713705).

123995879 is an equidigital number, since it uses as much as digits as its factorization.

123995879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17713704.

The product of its digits is 1224720, while the sum is 53.

The square root of 123995879 is about 11135.3436857602. The cubic root of 123995879 is about 498.6575709943.

The spelling of 123995879 in words is "one hundred twenty-three million, nine hundred ninety-five thousand, eight hundred seventy-nine".