13947861 has 16 divisors (see below), whose sum is σ = 19611648. Its totient is φ = 8804400.

The previous prime is 13947847. The next prime is 13947863. The reversal of 13947861 is 16874931.

It is not a de Polignac number, because 13947861 - 2¹⁰ = 13946837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13947863) 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, 2776 + ... + 5966.

It is an arithmetic number, because the mean of its divisors is an integer number (1225728).

Almost surely, 2^13947861 is an apocalyptic number.

It is an amenable number.

13947861 is a deficient number, since it is larger than the sum of its proper divisors (5663787).

13947861 is a wasteful number, since it uses less digits than its factorization.

13947861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272.

The product of its digits is 36288, while the sum is 39.

The square root of 13947861 is about 3734.6835207284. The cubic root of 13947861 is about 240.7146580152.

The spelling of 13947861 in words is "thirteen million, nine hundred forty-seven thousand, eight hundred sixty-one".