12398437 has 4 divisors (see below), whose sum is σ = 12608640. Its totient is φ = 12188236.

The previous prime is 12398429. The next prime is 12398467. The reversal of 12398437 is 73489321.

It is the 1438-th star number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73489321 = 19 ⋅3867859.

It is a cyclic number.

It is not a de Polignac number, because 12398437 - 2³ = 12398429 is a prime.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 12398396 and 12398405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12398467) 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, 105013 + ... + 105130.

It is an arithmetic number, because the mean of its divisors is an integer number (3152160).

Almost surely, 2^12398437 is an apocalyptic number.

It is an amenable number.

12398437 is a deficient number, since it is larger than the sum of its proper divisors (210203).

12398437 is an equidigital number, since it uses as much as digits as its factorization.

12398437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210202.

The product of its digits is 36288, while the sum is 37.

The square root of 12398437 is about 3521.1414342511. The cubic root of 12398437 is about 231.4491800367.

The spelling of 12398437 in words is "twelve million, three hundred ninety-eight thousand, four hundred thirty-seven".