13698621 has 24 divisors (see below), whose sum is σ = 20993024. Its totient is φ = 8592480.

The previous prime is 13698611. The next prime is 13698649. The reversal of 13698621 is 12689631.

It is not a de Polignac number, because 13698621 - 2⁹ = 13698109 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 (13698611) 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, 9660 + ... + 10986.

Almost surely, 2^13698621 is an apocalyptic number.

It is an amenable number.

13698621 is a deficient number, since it is larger than the sum of its proper divisors (7294403).

13698621 is a wasteful number, since it uses less digits than its factorization.

13698621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401 (or 1398 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 13698621 is about 3701.1648166489. The cubic root of 13698621 is about 239.2722223964.

The spelling of 13698621 in words is "thirteen million, six hundred ninety-eight thousand, six hundred twenty-one".