13569397 has 2 divisors, whose sum is σ = 13569398. Its totient is φ = 13569396.

The previous prime is 13569377. The next prime is 13569403. The reversal of 13569397 is 79396531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10150596 + 3418801 = 3186^2 + 1849^2 .

It is a cyclic number.

It is not a de Polignac number, because 13569397 - 2¹⁵ = 13536629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13569317) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6784698 + 6784699.

It is an arithmetic number, because the mean of its divisors is an integer number (6784699).

Almost surely, 2^13569397 is an apocalyptic number.

It is an amenable number.

13569397 is a deficient number, since it is larger than the sum of its proper divisors (1).

13569397 is an equidigital number, since it uses as much as digits as its factorization.

13569397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 43.

The square root of 13569397 is about 3683.6662443821. Note that the first 3 decimals coincide. The cubic root of 13569397 is about 238.5174638941.

The spelling of 13569397 in words is "thirteen million, five hundred sixty-nine thousand, three hundred ninety-seven".