13631705 has 8 divisors (see below), whose sum is σ = 17320392. Its totient is φ = 10263808.

The previous prime is 13631689. The next prime is 13631707. The reversal of 13631705 is 50713631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 287296 + 13344409 = 536^2 + 3653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13631705 - 2⁴ = 13631689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13631707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80102 + ... + 80271.

It is an arithmetic number, because the mean of its divisors is an integer number (2165049).

Almost surely, 2^13631705 is an apocalyptic number.

It is an amenable number.

13631705 is a deficient number, since it is larger than the sum of its proper divisors (3688687).

13631705 is a wasteful number, since it uses less digits than its factorization.

13631705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160395.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 13631705 is about 3692.1138931512. The cubic root of 13631705 is about 238.8819816123.

The spelling of 13631705 in words is "thirteen million, six hundred thirty-one thousand, seven hundred five".