16580609 has 2 divisors, whose sum is σ = 16580610. Its totient is φ = 16580608.

The previous prime is 16580587. The next prime is 16580621. The reversal of 16580609 is 90608561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 4190209 = 3520^2 + 2047^2 .

It is an emirp because it is prime and its reverse (90608561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16580609 - 2¹⁶ = 16515073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16580639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8290304 + 8290305.

It is an arithmetic number, because the mean of its divisors is an integer number (8290305).

It is a Proth number, since it is equal to 253 ⋅ 2¹⁶ + 1 and 253 < 2¹⁶.

Almost surely, 2^16580609 is an apocalyptic number.

It is an amenable number.

16580609 is a deficient number, since it is larger than the sum of its proper divisors (1).

16580609 is an equidigital number, since it uses as much as digits as its factorization.

16580609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 16580609 is about 4071.9293952622. The cubic root of 16580609 is about 254.9960732447.

The spelling of 16580609 in words is "sixteen million, five hundred eighty thousand, six hundred nine".