16883681 has 2 divisors, whose sum is σ = 16883682. Its totient is φ = 16883680.

The previous prime is 16883663. The next prime is 16883683. The reversal of 16883681 is 18638861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15673681 + 1210000 = 3959^2 + 1100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16883681 is a prime.

It is a super-2 number, since 2×16883681² = 570117368219522, which contains 22 as substring.

Together with 16883683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16883683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8441840 + 8441841.

It is an arithmetic number, because the mean of its divisors is an integer number (8441841).

Almost surely, 2^16883681 is an apocalyptic number.

It is an amenable number.

16883681 is a deficient number, since it is larger than the sum of its proper divisors (1).

16883681 is an equidigital number, since it uses as much as digits as its factorization.

16883681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 41.

The square root of 16883681 is about 4108.9756631063. The cubic root of 16883681 is about 256.5403675762.

The spelling of 16883681 in words is "sixteen million, eight hundred eighty-three thousand, six hundred eighty-one".