13670639 has 2 divisors, whose sum is σ = 13670640. Its totient is φ = 13670638.

The previous prime is 13670623. The next prime is 13670651. The reversal of 13670639 is 93607631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13670639 - 2⁴ = 13670623 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13670599 and 13670608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13670609) 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 as a sum of consecutive naturals, namely, 6835319 + 6835320.

It is an arithmetic number, because the mean of its divisors is an integer number (6835320).

Almost surely, 2^13670639 is an apocalyptic number.

13670639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13670639 is an equidigital number, since it uses as much as digits as its factorization.

13670639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 13670639 is about 3697.3827229542. The cubic root of 13670639 is about 239.1091918909.

The spelling of 13670639 in words is "thirteen million, six hundred seventy thousand, six hundred thirty-nine".