13747947641 has 2 divisors, whose sum is σ = 13747947642. Its totient is φ = 13747947640.

The previous prime is 13747947637. The next prime is 13747947649. The reversal of 13747947641 is 14674974731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13647146041 + 100801600 = 116821^2 + 10040^2 .

It is an emirp because it is prime and its reverse (14674974731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13747947641 - 2² = 13747947637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13747947649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6873973820 + 6873973821.

It is an arithmetic number, because the mean of its divisors is an integer number (6873973821).

Almost surely, 2^13747947641 is an apocalyptic number.

It is an amenable number.

13747947641 is a deficient number, since it is larger than the sum of its proper divisors (1).

13747947641 is an equidigital number, since it uses as much as digits as its factorization.

13747947641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 53.

The spelling of 13747947641 in words is "thirteen billion, seven hundred forty-seven million, nine hundred forty-seven thousand, six hundred forty-one".