12647389 has 4 divisors (see below), whose sum is σ = 12836224. Its totient is φ = 12458556.

The previous prime is 12647387. The next prime is 12647399. The reversal of 12647389 is 98374621.

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: 98374621 = 41 ⋅2399381.

It is a cyclic number.

It is not a de Polignac number, because 12647389 - 2¹ = 12647387 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 (12647381) 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, 94317 + ... + 94450.

It is an arithmetic number, because the mean of its divisors is an integer number (3209056).

Almost surely, 2^12647389 is an apocalyptic number.

It is an amenable number.

12647389 is a deficient number, since it is larger than the sum of its proper divisors (188835).

12647389 is an equidigital number, since it uses as much as digits as its factorization.

12647389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188834.

The product of its digits is 72576, while the sum is 40.

The square root of 12647389 is about 3556.3167744170. The cubic root of 12647389 is about 232.9880387064.

The spelling of 12647389 in words is "twelve million, six hundred forty-seven thousand, three hundred eighty-nine".