13843661 has 16 divisors (see below), whose sum is σ = 16221744. Its totient is φ = 11695104.

The previous prime is 13843637. The next prime is 13843663. The reversal of 13843661 is 16634831.

It can be written as a sum of positive squares in 8 ways, for example, as 198025 + 13645636 = 445^2 + 3694^2 .

It is a cyclic number.

It is not a de Polignac number, because 13843661 - 2¹⁰ = 13842637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13843663) 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, 7331 + ... + 9023.

It is an arithmetic number, because the mean of its divisors is an integer number (1013859).

Almost surely, 2^13843661 is an apocalyptic number.

It is an amenable number.

13843661 is a deficient number, since it is larger than the sum of its proper divisors (2378083).

13843661 is a wasteful number, since it uses less digits than its factorization.

13843661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760.

The product of its digits is 10368, while the sum is 32.

The square root of 13843661 is about 3720.7070564612. The cubic root of 13843661 is about 240.1137250376.

The spelling of 13843661 in words is "thirteen million, eight hundred forty-three thousand, six hundred sixty-one".