13391641 has 2 divisors, whose sum is σ = 13391642. Its totient is φ = 13391640.

The previous prime is 13391639. The next prime is 13391683. The reversal of 13391641 is 14619331.

13391641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8643600 + 4748041 = 2940^2 + 2179^2 .

It is a cyclic number.

It is not a de Polignac number, because 13391641 - 2¹ = 13391639 is a prime.

Together with 13391639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13391621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6695820 + 6695821.

It is an arithmetic number, because the mean of its divisors is an integer number (6695821).

Almost surely, 2^13391641 is an apocalyptic number.

It is an amenable number.

13391641 is a deficient number, since it is larger than the sum of its proper divisors (1).

13391641 is an equidigital number, since it uses as much as digits as its factorization.

13391641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 28.

The square root of 13391641 is about 3659.4591130384. The cubic root of 13391641 is about 237.4713745740.

The spelling of 13391641 in words is "thirteen million, three hundred ninety-one thousand, six hundred forty-one".