13814981 has 4 divisors (see below), whose sum is σ = 13852992. Its totient is φ = 13776972.

The previous prime is 13814963. The next prime is 13814989. The reversal of 13814981 is 18941831.

13814981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18941831 = 181 ⋅104651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13814981 is a prime.

It is a super-2 number, since 2×13814981² = 381707400060722, which contains 22 as substring.

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 (13814989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18455 + ... + 19188.

It is an arithmetic number, because the mean of its divisors is an integer number (3463248).

Almost surely, 2^13814981 is an apocalyptic number.

It is an amenable number.

13814981 is a deficient number, since it is larger than the sum of its proper divisors (38011).

13814981 is an equidigital number, since it uses as much as digits as its factorization.

13814981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38010.

The product of its digits is 6912, while the sum is 35.

The square root of 13814981 is about 3716.8509520830. The cubic root of 13814981 is about 239.9477953583.

The spelling of 13814981 in words is "thirteen million, eight hundred fourteen thousand, nine hundred eighty-one".