123873999 has 8 divisors (see below), whose sum is σ = 168679680. Its totient is φ = 80825496.

The previous prime is 123873991. The next prime is 123874033. The reversal of 123873999 is 999378321.

It is a happy number.

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

It is not a de Polignac number, because 123873999 - 2³ = 123873991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123873991) 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, 439129 + ... + 439410.

It is an arithmetic number, because the mean of its divisors is an integer number (21084960).

Almost surely, 2^123873999 is an apocalyptic number.

123873999 is a deficient number, since it is larger than the sum of its proper divisors (44805681).

123873999 is an equidigital number, since it uses as much as digits as its factorization.

123873999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878589.

The product of its digits is 734832, while the sum is 51.

The square root of 123873999 is about 11129.8696757869. The cubic root of 123873999 is about 498.4941346253.

The spelling of 123873999 in words is "one hundred twenty-three million, eight hundred seventy-three thousand, nine hundred ninety-nine".