16643339 has 2 divisors, whose sum is σ = 16643340. Its totient is φ = 16643338.

The previous prime is 16643309. The next prime is 16643351. The reversal of 16643339 is 93334661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16643339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16643299 and 16643308.

It is not a weakly prime, because it can be changed into another prime (16643309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321669 + 8321670.

It is an arithmetic number, because the mean of its divisors is an integer number (8321670).

Almost surely, 2^16643339 is an apocalyptic number.

16643339 is a deficient number, since it is larger than the sum of its proper divisors (1).

16643339 is an equidigital number, since it uses as much as digits as its factorization.

16643339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 35.

The square root of 16643339 is about 4079.6248602047. The cubic root of 16643339 is about 255.3172470799.

The spelling of 16643339 in words is "sixteen million, six hundred forty-three thousand, three hundred thirty-nine".