13087705 has 16 divisors (see below), whose sum is σ = 16796160. Its totient is φ = 9755392.

The previous prime is 13087699. The next prime is 13087709. The reversal of 13087705 is 50778031.

It is a cyclic number.

It is not a de Polignac number, because 13087705 - 2¹⁹ = 12563417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13087709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8376 + ... + 9814.

It is an arithmetic number, because the mean of its divisors is an integer number (1049760).

Almost surely, 2^13087705 is an apocalyptic number.

It is an amenable number.

13087705 is a deficient number, since it is larger than the sum of its proper divisors (3708455).

13087705 is a wasteful number, since it uses less digits than its factorization.

13087705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 13087705 is about 3617.6933258639. The cubic root of 13087705 is about 235.6610630634.

The spelling of 13087705 in words is "thirteen million, eighty-seven thousand, seven hundred five".