13981337 has 2 divisors, whose sum is σ = 13981338. Its totient is φ = 13981336.

The previous prime is 13981333. The next prime is 13981339. The reversal of 13981337 is 73318931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12823561 + 1157776 = 3581^2 + 1076^2 .

It is a cyclic number.

It is not a de Polignac number, because 13981337 - 2² = 13981333 is a prime.

Together with 13981339, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13981297 and 13981306.

It is not a weakly prime, because it can be changed into another prime (13981333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6990668 + 6990669.

It is an arithmetic number, because the mean of its divisors is an integer number (6990669).

Almost surely, 2^13981337 is an apocalyptic number.

It is an amenable number.

13981337 is a deficient number, since it is larger than the sum of its proper divisors (1).

13981337 is an equidigital number, since it uses as much as digits as its factorization.

13981337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 13981337 is about 3739.1626067878. The cubic root of 13981337 is about 240.9070824002.

The spelling of 13981337 in words is "thirteen million, nine hundred eighty-one thousand, three hundred thirty-seven".