12398649 has 4 divisors (see below), whose sum is σ = 16531536. Its totient is φ = 8265764.

The previous prime is 12398611. The next prime is 12398651. The reversal of 12398649 is 94689321.

12398649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12398649 - 2⁹ = 12398137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12398649.

It is not an unprimeable number, because it can be changed into a prime (12398669) 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, 2066439 + ... + 2066444.

It is an arithmetic number, because the mean of its divisors is an integer number (4132884).

Almost surely, 2^12398649 is an apocalyptic number.

It is an amenable number.

12398649 is a deficient number, since it is larger than the sum of its proper divisors (4132887).

12398649 is an equidigital number, since it uses as much as digits as its factorization.

12398649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132886.

The product of its digits is 93312, while the sum is 42.

The square root of 12398649 is about 3521.1715379970. The cubic root of 12398649 is about 231.4504992069.

The spelling of 12398649 in words is "twelve million, three hundred ninety-eight thousand, six hundred forty-nine".