13951381 has 2 divisors, whose sum is σ = 13951382. Its totient is φ = 13951380.

The previous prime is 13951313. The next prime is 13951397. The reversal of 13951381 is 18315931.

13951381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13950225 + 1156 = 3735^2 + 34^2 .

It is an emirp because it is prime and its reverse (18315931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13951381 - 2¹⁵ = 13918613 is a prime.

It is a super-2 number, since 2×13951381² = 389282063614322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13951481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6975690 + 6975691.

It is an arithmetic number, because the mean of its divisors is an integer number (6975691).

Almost surely, 2^13951381 is an apocalyptic number.

It is an amenable number.

13951381 is a deficient number, since it is larger than the sum of its proper divisors (1).

13951381 is an equidigital number, since it uses as much as digits as its factorization.

13951381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 31.

The square root of 13951381 is about 3735.1547491369. The cubic root of 13951381 is about 240.7349059067.

The spelling of 13951381 in words is "thirteen million, nine hundred fifty-one thousand, three hundred eighty-one".