16568413 has 2 divisors, whose sum is σ = 16568414. Its totient is φ = 16568412.

The previous prime is 16568411. The next prime is 16568423. The reversal of 16568413 is 31486561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10004569 + 6563844 = 3163^2 + 2562^2 .

It is a cyclic number.

It is not a de Polignac number, because 16568413 - 2¹ = 16568411 is a prime.

Together with 16568411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16568411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8284206 + 8284207.

It is an arithmetic number, because the mean of its divisors is an integer number (8284207).

Almost surely, 2^16568413 is an apocalyptic number.

It is an amenable number.

16568413 is a deficient number, since it is larger than the sum of its proper divisors (1).

16568413 is an equidigital number, since it uses as much as digits as its factorization.

16568413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 16568413 is about 4070.4315496026. The cubic root of 16568413 is about 254.9335364397.

The spelling of 16568413 in words is "sixteen million, five hundred sixty-eight thousand, four hundred thirteen".