13430639 has 2 divisors, whose sum is σ = 13430640. Its totient is φ = 13430638.

The previous prime is 13430633. The next prime is 13430647. The reversal of 13430639 is 93603431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13430639 - 2⁸ = 13430383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13430633) 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, 6715319 + 6715320.

It is an arithmetic number, because the mean of its divisors is an integer number (6715320).

Almost surely, 2^13430639 is an apocalyptic number.

13430639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13430639 is an equidigital number, since it uses as much as digits as its factorization.

13430639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 13430639 is about 3664.7836225349. The cubic root of 13430639 is about 237.7016658323.

The spelling of 13430639 in words is "thirteen million, four hundred thirty thousand, six hundred thirty-nine".