13817897 has 2 divisors, whose sum is σ = 13817898. Its totient is φ = 13817896.

The previous prime is 13817893. The next prime is 13817929. The reversal of 13817897 is 79871831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8637721 + 5180176 = 2939^2 + 2276^2 .

It is a cyclic number.

It is not a de Polignac number, because 13817897 - 2² = 13817893 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13817893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6908948 + 6908949.

It is an arithmetic number, because the mean of its divisors is an integer number (6908949).

Almost surely, 2^13817897 is an apocalyptic number.

It is an amenable number.

13817897 is a deficient number, since it is larger than the sum of its proper divisors (1).

13817897 is an equidigital number, since it uses as much as digits as its factorization.

13817897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 44.

The square root of 13817897 is about 3717.2431989312. The cubic root of 13817897 is about 239.9646765143.

The spelling of 13817897 in words is "thirteen million, eight hundred seventeen thousand, eight hundred ninety-seven".