12639673 has 4 divisors (see below), whose sum is σ = 13189248. Its totient is φ = 12090100.

The previous prime is 12639667. The next prime is 12639701. The reversal of 12639673 is 37693621.

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 12639673 - 2¹³ = 12631481 is a prime.

It is a super-2 number, since 2×12639673² = 319522667093858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12639073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274753 + ... + 274798.

It is an arithmetic number, because the mean of its divisors is an integer number (3297312).

Almost surely, 2^12639673 is an apocalyptic number.

It is an amenable number.

12639673 is a deficient number, since it is larger than the sum of its proper divisors (549575).

12639673 is an equidigital number, since it uses as much as digits as its factorization.

12639673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549574.

The product of its digits is 40824, while the sum is 37.

The square root of 12639673 is about 3555.2317786609. The cubic root of 12639673 is about 232.9406481232.

The spelling of 12639673 in words is "twelve million, six hundred thirty-nine thousand, six hundred seventy-three".