13661697 has 16 divisors (see below), whose sum is σ = 21536640. Its totient is φ = 7537152.

The previous prime is 13661689. The next prime is 13661759. The reversal of 13661697 is 79616631.

It is not a de Polignac number, because 13661697 - 2³ = 13661689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13661647) 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, 10608 + ... + 11825.

It is an arithmetic number, because the mean of its divisors is an integer number (1346040).

Almost surely, 2^13661697 is an apocalyptic number.

It is an amenable number.

13661697 is a deficient number, since it is larger than the sum of its proper divisors (7874943).

13661697 is a wasteful number, since it uses less digits than its factorization.

13661697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22472.

The product of its digits is 40824, while the sum is 39.

The square root of 13661697 is about 3696.1732913921. The cubic root of 13661697 is about 239.0570465414.

The spelling of 13661697 in words is "thirteen million, six hundred sixty-one thousand, six hundred ninety-seven".