16809601 has 2 divisors, whose sum is σ = 16809602. Its totient is φ = 16809600.

The previous prime is 16809557. The next prime is 16809607. The reversal of 16809601 is 10690861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9241600 + 7568001 = 3040^2 + 2751^2 .

It is a cyclic number.

It is not a de Polignac number, because 16809601 - 2¹³ = 16801409 is a prime.

It is not a weakly prime, because it can be changed into another prime (16809607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8404800 + 8404801.

It is an arithmetic number, because the mean of its divisors is an integer number (8404801).

Almost surely, 2^16809601 is an apocalyptic number.

It is an amenable number.

16809601 is a deficient number, since it is larger than the sum of its proper divisors (1).

16809601 is an equidigital number, since it uses as much as digits as its factorization.

16809601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 16809601 is about 4099.9513411747. The cubic root of 16809601 is about 256.1646127562.

The spelling of 16809601 in words is "sixteen million, eight hundred nine thousand, six hundred one".