16552609 has 2 divisors, whose sum is σ = 16552610. Its totient is φ = 16552608.

The previous prime is 16552597. The next prime is 16552619. The reversal of 16552609 is 90625561.

It is a happy number.

16552609 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., 11390625 + 5161984 = 3375^2 + 2272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16552609 is a prime.

It is not a weakly prime, because it can be changed into another prime (16552619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8276304 + 8276305.

It is an arithmetic number, because the mean of its divisors is an integer number (8276305).

Almost surely, 2^16552609 is an apocalyptic number.

It is an amenable number.

16552609 is a deficient number, since it is larger than the sum of its proper divisors (1).

16552609 is an equidigital number, since it uses as much as digits as its factorization.

16552609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 16552609 is about 4068.4897689438. The cubic root of 16552609 is about 254.8524534111.

It can be divided in two parts, 16552 and 609, that added together give a square (17161 = 131²).

The spelling of 16552609 in words is "sixteen million, five hundred fifty-two thousand, six hundred nine".