13645897 has 2 divisors, whose sum is σ = 13645898. Its totient is φ = 13645896.

The previous prime is 13645847. The next prime is 13645909. The reversal of 13645897 is 79854631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9418761 + 4227136 = 3069^2 + 2056^2 .

It is an emirp because it is prime and its reverse (79854631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13645897 is a prime.

It is not a weakly prime, because it can be changed into another prime (13645837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6822948 + 6822949.

It is an arithmetic number, because the mean of its divisors is an integer number (6822949).

Almost surely, 2^13645897 is an apocalyptic number.

It is an amenable number.

13645897 is a deficient number, since it is larger than the sum of its proper divisors (1).

13645897 is an equidigital number, since it uses as much as digits as its factorization.

13645897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 13645897 is about 3694.0353273893. The cubic root of 13645897 is about 238.9648530565.

The spelling of 13645897 in words is "thirteen million, six hundred forty-five thousand, eight hundred ninety-seven".