13661793 has 24 divisors (see below), whose sum is σ = 21265920. Its totient is φ = 8426880.

The previous prime is 13661783. The next prime is 13661797. The reversal of 13661793 is 39716631.

13661793 is a `hidden beast` number, since 1 + 36 + 617 + 9 + 3 = 666.

It is not a de Polignac number, because 13661793 - 2⁹ = 13661281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13661797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5353 + ... + 7481.

It is an arithmetic number, because the mean of its divisors is an integer number (886080).

Almost surely, 2^13661793 is an apocalyptic number.

It is an amenable number.

13661793 is a deficient number, since it is larger than the sum of its proper divisors (7604127).

13661793 is a wasteful number, since it uses less digits than its factorization.

13661793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2186 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 13661793 is about 3696.1862777733. The cubic root of 13661793 is about 239.0576064870.

The spelling of 13661793 in words is "thirteen million, six hundred sixty-one thousand, seven hundred ninety-three".