16208861 has 2 divisors, whose sum is σ = 16208862. Its totient is φ = 16208860.

The previous prime is 16208851. The next prime is 16208867. The reversal of 16208861 is 16880261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10686361 + 5522500 = 3269^2 + 2350^2 .

It is a cyclic number.

It is not a de Polignac number, because 16208861 - 2¹⁸ = 15946717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16208867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8104430 + 8104431.

It is an arithmetic number, because the mean of its divisors is an integer number (8104431).

Almost surely, 2^16208861 is an apocalyptic number.

It is an amenable number.

16208861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16208861 is an equidigital number, since it uses as much as digits as its factorization.

16208861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 16208861 is about 4026.0229755927. The cubic root of 16208861 is about 253.0759248660.

The spelling of 16208861 in words is "sixteen million, two hundred eight thousand, eight hundred sixty-one".