13677021 has 18 divisors (see below), whose sum is σ = 20172698. Its totient is φ = 8929440.

The previous prime is 13677007. The next prime is 13677031. The reversal of 13677021 is 12077631.

13677021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 3980025 + 9696996 = 1995^2 + 3114^2 .

It is not a de Polignac number, because 13677021 - 2¹⁰ = 13675997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13677031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25011 + ... + 25551.

Almost surely, 2^13677021 is an apocalyptic number.

It is an amenable number.

13677021 is a deficient number, since it is larger than the sum of its proper divisors (6495677).

13677021 is an equidigital number, since it uses as much as digits as its factorization.

13677021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 13677021 is about 3698.2456651769. The cubic root of 13677021 is about 239.1463946742.

The spelling of 13677021 in words is "thirteen million, six hundred seventy-seven thousand, twenty-one".