123313999 has 4 divisors (see below), whose sum is σ = 124130800. Its totient is φ = 122497200.

The previous prime is 123313991. The next prime is 123314021. The reversal of 123313999 is 999313321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999313321 = 157 ⋅6365053.

It is a cyclic number.

It is not a de Polignac number, because 123313999 - 2³ = 123313991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123313991) 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, 408174 + ... + 408475.

It is an arithmetic number, because the mean of its divisors is an integer number (31032700).

Almost surely, 2^123313999 is an apocalyptic number.

123313999 is a deficient number, since it is larger than the sum of its proper divisors (816801).

123313999 is an equidigital number, since it uses as much as digits as its factorization.

123313999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816800.

The product of its digits is 39366, while the sum is 40.

The square root of 123313999 is about 11104.6836515049. The cubic root of 123313999 is about 497.7418152235.

The spelling of 123313999 in words is "one hundred twenty-three million, three hundred thirteen thousand, nine hundred ninety-nine".