16565897 has 2 divisors, whose sum is σ = 16565898. Its totient is φ = 16565896.

The previous prime is 16565863. The next prime is 16565917. The reversal of 16565897 is 79856561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16192576 + 373321 = 4024^2 + 611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16565897 is a prime.

It is not a weakly prime, because it can be changed into another prime (16565597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282948 + 8282949.

It is an arithmetic number, because the mean of its divisors is an integer number (8282949).

Almost surely, 2^16565897 is an apocalyptic number.

It is an amenable number.

16565897 is a deficient number, since it is larger than the sum of its proper divisors (1).

16565897 is an equidigital number, since it uses as much as digits as its factorization.

16565897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 47.

The square root of 16565897 is about 4070.1224797296. The cubic root of 16565897 is about 254.9206314571.

The spelling of 16565897 in words is "sixteen million, five hundred sixty-five thousand, eight hundred ninety-seven".