3644569 has 2 divisors, whose sum is σ = 3644570. Its totient is φ = 3644568.

The previous prime is 3644513. The next prime is 3644573. The reversal of 3644569 is 9654463.

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., 2175625 + 1468944 = 1475^2 + 1212^2 .

It is a cyclic number.

It is not a de Polignac number, because 3644569 - 2⁹ = 3644057 is a prime.

It is a super-2 number, since 2×3644569² = 26565766391522, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3⁵ + 6⁸ + 4⁷ + 4⁹ + 5 + 6⁸ + 9⁴ .

It is not a weakly prime, because it can be changed into another prime (3641569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822284 + 1822285.

It is an arithmetic number, because the mean of its divisors is an integer number (1822285).

Almost surely, 2^3644569 is an apocalyptic number.

It is an amenable number.

3644569 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644569 is an equidigital number, since it uses as much as digits as its factorization.

3644569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

The square root of 3644569 is about 1909.0754306732. The cubic root of 3644569 is about 153.8917691212.

The spelling of 3644569 in words is "three million, six hundred forty-four thousand, five hundred sixty-nine".