13615397 has 2 divisors, whose sum is σ = 13615398. Its totient is φ = 13615396.

The previous prime is 13615387. The next prime is 13615409. The reversal of 13615397 is 79351631.

13615397 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., 12952801 + 662596 = 3599^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 13615397 - 2⁸ = 13615141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13615307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6807698 + 6807699.

It is an arithmetic number, because the mean of its divisors is an integer number (6807699).

Almost surely, 2^13615397 is an apocalyptic number.

It is an amenable number.

13615397 is a deficient number, since it is larger than the sum of its proper divisors (1).

13615397 is an equidigital number, since it uses as much as digits as its factorization.

13615397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 35.

The square root of 13615397 is about 3689.9047413179. The cubic root of 13615397 is about 238.7866831421.

The spelling of 13615397 in words is "thirteen million, six hundred fifteen thousand, three hundred ninety-seven".