16787609 has 2 divisors, whose sum is σ = 16787610. Its totient is φ = 16787608.

The previous prime is 16787597. The next prime is 16787629. The reversal of 16787609 is 90678761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9241600 + 7546009 = 3040^2 + 2747^2 .

It is a cyclic number.

It is not a de Polignac number, because 16787609 - 2¹⁶ = 16722073 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16787609.

It is not a weakly prime, because it can be changed into another prime (16787629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8393804 + 8393805.

It is an arithmetic number, because the mean of its divisors is an integer number (8393805).

Almost surely, 2^16787609 is an apocalyptic number.

It is an amenable number.

16787609 is a deficient number, since it is larger than the sum of its proper divisors (1).

16787609 is an equidigital number, since it uses as much as digits as its factorization.

16787609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 16787609 is about 4097.2684803415. The cubic root of 16787609 is about 256.0528506199.

The spelling of 16787609 in words is "sixteen million, seven hundred eighty-seven thousand, six hundred nine".