13270639 has 2 divisors, whose sum is σ = 13270640. Its totient is φ = 13270638.

The previous prime is 13270637. The next prime is 13270643. The reversal of 13270639 is 93607231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13270639 - 2¹ = 13270637 is a prime.

It is a super-2 number, since 2×13270639² = 352219718936642, which contains 22 as substring.

Together with 13270637, 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 13270639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13270637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6635319 + 6635320.

It is an arithmetic number, because the mean of its divisors is an integer number (6635320).

Almost surely, 2^13270639 is an apocalyptic number.

13270639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13270639 is an equidigital number, since it uses as much as digits as its factorization.

13270639 is an evil number, because the sum of its binary digits is even.

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

The square root of 13270639 is about 3642.8888261928. Note that the first 4 decimals coincide. The cubic root of 13270639 is about 236.7539744882.

The spelling of 13270639 in words is "thirteen million, two hundred seventy thousand, six hundred thirty-nine".