12623999 has 4 divisors (see below), whose sum is σ = 13288440. Its totient is φ = 11959560.

The previous prime is 12623981. The next prime is 12624043. The reversal of 12623999 is 99932621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99932621 = 41 ⋅2437381.

It is a cyclic number.

It is not a de Polignac number, because 12623999 - 2¹⁶ = 12558463 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 (12623929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332192 + ... + 332229.

It is an arithmetic number, because the mean of its divisors is an integer number (3322110).

Almost surely, 2^12623999 is an apocalyptic number.

12623999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12623999 is a deficient number, since it is larger than the sum of its proper divisors (664441).

12623999 is an equidigital number, since it uses as much as digits as its factorization.

12623999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664440.

The product of its digits is 52488, while the sum is 41.

The square root of 12623999 is about 3553.0267378673. The cubic root of 12623999 is about 232.8443212123.

The spelling of 12623999 in words is "twelve million, six hundred twenty-three thousand, nine hundred ninety-nine".