3643442269 has 4 divisors (see below), whose sum is σ = 3646776796. Its totient is φ = 3640107744.

The previous prime is 3643442251. The next prime is 3643442279. The reversal of 3643442269 is 9622443463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9622443463 = 41 ⋅234693743.

It can be written as a sum of positive squares in 2 ways, for example, as 1777634244 + 1865808025 = 42162^2 + 43195^2 .

It is a cyclic number.

It is not a de Polignac number, because 3643442269 - 2⁵ = 3643442237 is a prime.

It is a super-2 number, since 2×3643442269² = 26549343135071736722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643442249) 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, 1665624 + ... + 1667809.

It is an arithmetic number, because the mean of its divisors is an integer number (911694199).

Almost surely, 2^3643442269 is an apocalyptic number.

It is an amenable number.

3643442269 is a deficient number, since it is larger than the sum of its proper divisors (3334527).

3643442269 is a wasteful number, since it uses less digits than its factorization.

3643442269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334526.

The product of its digits is 746496, while the sum is 43.

The square root of 3643442269 is about 60360.9333012670. The cubic root of 3643442269 is about 1538.7590876401.

The spelling of 3643442269 in words is "three billion, six hundred forty-three million, four hundred forty-two thousand, two hundred sixty-nine".