13688746 has 4 divisors (see below), whose sum is σ = 20533122. Its totient is φ = 6844372.

The previous prime is 13688699. The next prime is 13688761. The reversal of 13688746 is 64788631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13653025 + 35721 = 3695^2 + 189^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422185 + ... + 3422188.

Almost surely, 2^13688746 is an apocalyptic number.

13688746 is a deficient number, since it is larger than the sum of its proper divisors (6844376).

13688746 is an equidigital number, since it uses as much as digits as its factorization.

13688746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844375.

The product of its digits is 193536, while the sum is 43.

The square root of 13688746 is about 3699.8305366598. The cubic root of 13688746 is about 239.2147134158.

The spelling of 13688746 in words is "thirteen million, six hundred eighty-eight thousand, seven hundred forty-six".