13917247 has 2 divisors, whose sum is σ = 13917248. Its totient is φ = 13917246.

The previous prime is 13917223. The next prime is 13917263. The reversal of 13917247 is 74271931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13917247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13917847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6958623 + 6958624.

It is an arithmetic number, because the mean of its divisors is an integer number (6958624).

Almost surely, 2^13917247 is an apocalyptic number.

13917247 is a deficient number, since it is larger than the sum of its proper divisors (1).

13917247 is an equidigital number, since it uses as much as digits as its factorization.

13917247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 13917247 is about 3730.5826622660. The cubic root of 13917247 is about 240.5384150611.

The spelling of 13917247 in words is "thirteen million, nine hundred seventeen thousand, two hundred forty-seven".