13981417 has 2 divisors, whose sum is σ = 13981418. Its totient is φ = 13981416.

The previous prime is 13981399. The next prime is 13981421. The reversal of 13981417 is 71418931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13980121 + 1296 = 3739^2 + 36^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13981417 is a prime.

It is not a weakly prime, because it can be changed into another prime (13981427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6990708 + 6990709.

It is an arithmetic number, because the mean of its divisors is an integer number (6990709).

Almost surely, 2^13981417 is an apocalyptic number.

It is an amenable number.

13981417 is a deficient number, since it is larger than the sum of its proper divisors (1).

13981417 is an equidigital number, since it uses as much as digits as its factorization.

13981417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The square root of 13981417 is about 3739.1733043549. The cubic root of 13981417 is about 240.9075418824.

The spelling of 13981417 in words is "thirteen million, nine hundred eighty-one thousand, four hundred seventeen".