12938817 has 4 divisors (see below), whose sum is σ = 17251760. Its totient is φ = 8625876.

The previous prime is 12938813. The next prime is 12938831. The reversal of 12938817 is 71883921.

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 not a de Polignac number, because 12938817 - 2² = 12938813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12938813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2156467 + ... + 2156472.

It is an arithmetic number, because the mean of its divisors is an integer number (4312940).

Almost surely, 2^12938817 is an apocalyptic number.

It is an amenable number.

12938817 is a deficient number, since it is larger than the sum of its proper divisors (4312943).

12938817 is an equidigital number, since it uses as much as digits as its factorization.

12938817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4312942.

The product of its digits is 24192, while the sum is 39.

The square root of 12938817 is about 3597.0567134812. The cubic root of 12938817 is about 234.7640123832.

The spelling of 12938817 in words is "twelve million, nine hundred thirty-eight thousand, eight hundred seventeen".