13408687 has 2 divisors, whose sum is σ = 13408688. Its totient is φ = 13408686.

The previous prime is 13408679. The next prime is 13408721. The reversal of 13408687 is 78680431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13408687 - 2³ = 13408679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13408627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6704343 + 6704344.

It is an arithmetic number, because the mean of its divisors is an integer number (6704344).

Almost surely, 2^13408687 is an apocalyptic number.

13408687 is a deficient number, since it is larger than the sum of its proper divisors (1).

13408687 is an equidigital number, since it uses as much as digits as its factorization.

13408687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 13408687 is about 3661.7874050797. The cubic root of 13408687 is about 237.5720896580.

The spelling of 13408687 in words is "thirteen million, four hundred eight thousand, six hundred eighty-seven".