13817961 has 12 divisors (see below), whose sum is σ = 20016880. Its totient is φ = 9185400.

The previous prime is 13817933. The next prime is 13817987. The reversal of 13817961 is 16971831.

13817961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13817961 - 2⁵ = 13817929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13817261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1386 + ... + 5436.

Almost surely, 2^13817961 is an apocalyptic number.

It is an amenable number.

13817961 is a deficient number, since it is larger than the sum of its proper divisors (6198919).

13817961 is a wasteful number, since it uses less digits than its factorization.

13817961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436 (or 4433 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 13817961 is about 3717.2518074513. The cubic root of 13817961 is about 239.9650469931.

The spelling of 13817961 in words is "thirteen million, eight hundred seventeen thousand, nine hundred sixty-one".