12399599 has 4 divisors (see below), whose sum is σ = 12938736. Its totient is φ = 11860464.

The previous prime is 12399593. The next prime is 12399637. The reversal of 12399599 is 99599321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99599321 = 3389 ⋅29389.

It is a cyclic number.

It is not a de Polignac number, because 12399599 - 2²⁰ = 11351023 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 (12399593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269534 + ... + 269579.

It is an arithmetic number, because the mean of its divisors is an integer number (3234684).

Almost surely, 2^12399599 is an apocalyptic number.

12399599 is a deficient number, since it is larger than the sum of its proper divisors (539137).

12399599 is an equidigital number, since it uses as much as digits as its factorization.

12399599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539136.

The product of its digits is 196830, while the sum is 47.

The square root of 12399599 is about 3521.3064336976. The cubic root of 12399599 is about 231.4564103982.

The spelling of 12399599 in words is "twelve million, three hundred ninety-nine thousand, five hundred ninety-nine".