12173639 has 2 divisors, whose sum is σ = 12173640. Its totient is φ = 12173638.

The previous prime is 12173617. The next prime is 12173653. The reversal of 12173639 is 93637121.

It is a happy number.

12173639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12173639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12103639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086819 + 6086820.

It is an arithmetic number, because the mean of its divisors is an integer number (6086820).

Almost surely, 2^12173639 is an apocalyptic number.

12173639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12173639 is an equidigital number, since it uses as much as digits as its factorization.

12173639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 32.

The square root of 12173639 is about 3489.0742325150. The cubic root of 12173639 is about 230.0418260418.

The spelling of 12173639 in words is "twelve million, one hundred seventy-three thousand, six hundred thirty-nine".