12398239 has 4 divisors (see below), whose sum is σ = 14169424. Its totient is φ = 10627056.

The previous prime is 12398231. The next prime is 12398257. The reversal of 12398239 is 93289321.

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

It is a cyclic number.

It is not a de Polignac number, because 12398239 - 2³ = 12398231 is a prime.

It is a super-2 number, since 2×12398239² = 307432660602242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12398198 and 12398207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12398231) 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, 885582 + ... + 885595.

It is an arithmetic number, because the mean of its divisors is an integer number (3542356).

Almost surely, 2^12398239 is an apocalyptic number.

12398239 is a deficient number, since it is larger than the sum of its proper divisors (1771185).

12398239 is an equidigital number, since it uses as much as digits as its factorization.

12398239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771184.

The product of its digits is 23328, while the sum is 37.

The square root of 12398239 is about 3521.1133182560. The cubic root of 12398239 is about 231.4479479679.

The spelling of 12398239 in words is "twelve million, three hundred ninety-eight thousand, two hundred thirty-nine".