14213981 has 2 divisors, whose sum is σ = 14213982. Its totient is φ = 14213980.

The previous prime is 14213929. The next prime is 14214019. The reversal of 14213981 is 18931241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8008900 + 6205081 = 2830^2 + 2491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14213981 is a prime.

It is a super-2 number, since 2×14213981² = 404074511736722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14213081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7106990 + 7106991.

It is an arithmetic number, because the mean of its divisors is an integer number (7106991).

Almost surely, 2^14213981 is an apocalyptic number.

It is an amenable number.

14213981 is a deficient number, since it is larger than the sum of its proper divisors (1).

14213981 is an equidigital number, since it uses as much as digits as its factorization.

14213981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 14213981 is about 3770.1433659743. The cubic root of 14213981 is about 242.2359388732.

The spelling of 14213981 in words is "fourteen million, two hundred thirteen thousand, nine hundred eighty-one".