13072639 has 2 divisors, whose sum is σ = 13072640. Its totient is φ = 13072638.

The previous prime is 13072637. The next prime is 13072651. The reversal of 13072639 is 93627031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13072639 - 2¹ = 13072637 is a prime.

Together with 13072637, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13072639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13072637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6536319 + 6536320.

It is an arithmetic number, because the mean of its divisors is an integer number (6536320).

Almost surely, 2^13072639 is an apocalyptic number.

13072639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13072639 is an equidigital number, since it uses as much as digits as its factorization.

13072639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 13072639 is about 3615.6104602128. The cubic root of 13072639 is about 235.5706007343.

The spelling of 13072639 in words is "thirteen million, seventy-two thousand, six hundred thirty-nine".