13981774 has 12 divisors (see below), whose sum is σ = 21219624. Its totient is φ = 6909504.

The previous prime is 13981729. The next prime is 13981789. The reversal of 13981774 is 47718931.

13981774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18447 + ... + 19189.

It is an arithmetic number, because the mean of its divisors is an integer number (1768302).

Almost surely, 2^13981774 is an apocalyptic number.

13981774 is a deficient number, since it is larger than the sum of its proper divisors (7237850).

13981774 is an frugal number, since it uses more digits than its factorization.

13981774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 842 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 13981774 is about 3739.2210418749. The cubic root of 13981774 is about 240.9095923008.

The spelling of 13981774 in words is "thirteen million, nine hundred eighty-one thousand, seven hundred seventy-four".