13447919 has 2 divisors, whose sum is σ = 13447920. Its totient is φ = 13447918.

The previous prime is 13447891. The next prime is 13447921. The reversal of 13447919 is 91974431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13447919 is a prime.

It is a super-2 number, since 2×13447919² = 361693050861122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 13447921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13447219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6723959 + 6723960.

It is an arithmetic number, because the mean of its divisors is an integer number (6723960).

Almost surely, 2^13447919 is an apocalyptic number.

13447919 is a deficient number, since it is larger than the sum of its proper divisors (1).

13447919 is an equidigital number, since it uses as much as digits as its factorization.

13447919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 13447919 is about 3667.1404390887. The cubic root of 13447919 is about 237.8035652894.

The spelling of 13447919 in words is "thirteen million, four hundred forty-seven thousand, nine hundred nineteen".