3641609 has 2 divisors, whose sum is σ = 3641610. Its totient is φ = 3641608.

The previous prime is 3641593. The next prime is 3641611. The reversal of 3641609 is 9061463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1951609 + 1690000 = 1397^2 + 1300^2 .

It is a cyclic number.

It is not a de Polignac number, because 3641609 - 2⁴ = 3641593 is a prime.

It is a super-2 number, since 2×3641609² = 26522632217762, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3641611, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3641629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820804 + 1820805.

It is an arithmetic number, because the mean of its divisors is an integer number (1820805).

Almost surely, 2^3641609 is an apocalyptic number.

It is an amenable number.

3641609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3641609 is an equidigital number, since it uses as much as digits as its factorization.

3641609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 3641609 is about 1908.3000288215. The cubic root of 3641609 is about 153.8500958798.

The spelling of 3641609 in words is "three million, six hundred forty-one thousand, six hundred nine".