3669569 has 4 divisors (see below), whose sum is σ = 3885444. Its totient is φ = 3453696.

The previous prime is 3669557. The next prime is 3669583. The reversal of 3669569 is 9659663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3010225 + 659344 = 1735^2 + 812^2 .

It is a cyclic number.

It is not a de Polignac number, because 3669569 - 2⁴ = 3669553 is a prime.

It is a super-2 number, since 2×3669569² = 26931473291522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3669529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107912 + ... + 107945.

It is an arithmetic number, because the mean of its divisors is an integer number (971361).

Almost surely, 2^3669569 is an apocalyptic number.

It is an amenable number.

3669569 is a deficient number, since it is larger than the sum of its proper divisors (215875).

3669569 is a wasteful number, since it uses less digits than its factorization.

3669569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215874.

The product of its digits is 262440, while the sum is 44.

The square root of 3669569 is about 1915.6119126796. The cubic root of 3669569 is about 154.2428422507.

The spelling of 3669569 in words is "three million, six hundred sixty-nine thousand, five hundred sixty-nine".