13697389 has 2 divisors, whose sum is σ = 13697390. Its totient is φ = 13697388.

The previous prime is 13697377. The next prime is 13697399. The reversal of 13697389 is 98379631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9424900 + 4272489 = 3070^2 + 2067^2 .

It is a cyclic number.

It is not a de Polignac number, because 13697389 - 2⁵ = 13697357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13697339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6848694 + 6848695.

It is an arithmetic number, because the mean of its divisors is an integer number (6848695).

Almost surely, 2^13697389 is an apocalyptic number.

It is an amenable number.

13697389 is a deficient number, since it is larger than the sum of its proper divisors (1).

13697389 is an equidigital number, since it uses as much as digits as its factorization.

13697389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 13697389 is about 3700.9983788162. The cubic root of 13697389 is about 239.2650491144.

The spelling of 13697389 in words is "thirteen million, six hundred ninety-seven thousand, three hundred eighty-nine".