3668569 has 4 divisors (see below), whose sum is σ = 3828096. Its totient is φ = 3509044.

The previous prime is 3668563. The next prime is 3668579. The reversal of 3668569 is 9658663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9658663 = 7 ⋅1379809.

It is a cyclic number.

It is not a de Polignac number, because 3668569 - 2⁹ = 3668057 is a prime.

It is a super-2 number, since 2×3668569² = 26916797015522, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁹ + 6⁵ + 6⁵ + 8³ + 5⁹ + 6⁸ + 9² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3668563) 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, 79729 + ... + 79774.

It is an arithmetic number, because the mean of its divisors is an integer number (957024).

Almost surely, 2^3668569 is an apocalyptic number.

It is an amenable number.

3668569 is a deficient number, since it is larger than the sum of its proper divisors (159527).

3668569 is a wasteful number, since it uses less digits than its factorization.

3668569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159526.

The product of its digits is 233280, while the sum is 43.

The square root of 3668569 is about 1915.3508816924. The cubic root of 3668569 is about 154.2288299915.

The spelling of 3668569 in words is "three million, six hundred sixty-eight thousand, five hundred sixty-nine".