16304689 has 2 divisors, whose sum is σ = 16304690. Its totient is φ = 16304688.

The previous prime is 16304663. The next prime is 16304713. The reversal of 16304689 is 98640361.

16304689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13690000 + 2614689 = 3700^2 + 1617^2 .

It is a cyclic number.

It is not a de Polignac number, because 16304689 - 2²³ = 7916081 is a prime.

It is not a weakly prime, because it can be changed into another prime (16304089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8152344 + 8152345.

It is an arithmetic number, because the mean of its divisors is an integer number (8152345).

Almost surely, 2^16304689 is an apocalyptic number.

It is an amenable number.

16304689 is a deficient number, since it is larger than the sum of its proper divisors (1).

16304689 is an equidigital number, since it uses as much as digits as its factorization.

16304689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 16304689 is about 4037.9065120431. The cubic root of 16304689 is about 253.5736798357.

The spelling of 16304689 in words is "sixteen million, three hundred four thousand, six hundred eighty-nine".