13087639 has 2 divisors, whose sum is σ = 13087640. Its totient is φ = 13087638.

The previous prime is 13087631. The next prime is 13087649. The reversal of 13087639 is 93678031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13087639 - 2³ = 13087631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13087598 and 13087607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13087631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6543819 + 6543820.

It is an arithmetic number, because the mean of its divisors is an integer number (6543820).

Almost surely, 2^13087639 is an apocalyptic number.

13087639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13087639 is an equidigital number, since it uses as much as digits as its factorization.

13087639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 13087639 is about 3617.6842040178. The cubic root of 13087639 is about 235.6606669243.

The spelling of 13087639 in words is "thirteen million, eighty-seven thousand, six hundred thirty-nine".