13142639 has 2 divisors, whose sum is σ = 13142640. Its totient is φ = 13142638.

The previous prime is 13142621. The next prime is 13142641. The reversal of 13142639 is 93624131.

13142639 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-13142639 is a prime.

It is a Sophie Germain prime.

Together with 13142641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13142839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6571319 + 6571320.

It is an arithmetic number, because the mean of its divisors is an integer number (6571320).

Almost surely, 2^13142639 is an apocalyptic number.

13142639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13142639 is an equidigital number, since it uses as much as digits as its factorization.

13142639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 13142639 is about 3625.2777824603. The cubic root of 13142639 is about 235.9903220679.

The spelling of 13142639 in words is "thirteen million, one hundred forty-two thousand, six hundred thirty-nine".