13731947 has 2 divisors, whose sum is σ = 13731948. Its totient is φ = 13731946.

The previous prime is 13731941. The next prime is 13731961. The reversal of 13731947 is 74913731.

It is a weak prime.

It is an emirp because it is prime and its reverse (74913731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13731947 - 2⁴ = 13731931 is a prime.

It is not a weakly prime, because it can be changed into another prime (13731941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6865973 + 6865974.

It is an arithmetic number, because the mean of its divisors is an integer number (6865974).

Almost surely, 2^13731947 is an apocalyptic number.

13731947 is a deficient number, since it is larger than the sum of its proper divisors (1).

13731947 is an equidigital number, since it uses as much as digits as its factorization.

13731947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 35.

The square root of 13731947 is about 3705.6641779848. The cubic root of 13731947 is about 239.4660990511.

The spelling of 13731947 in words is "thirteen million, seven hundred thirty-one thousand, nine hundred forty-seven".