3639469 has 4 divisors (see below), whose sum is σ = 3831040. Its totient is φ = 3447900.

The previous prime is 3639421. The next prime is 3639473. The reversal of 3639469 is 9649363.

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: 9649363 = 1423 ⋅6781.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3639469 is a prime.

It is a super-2 number, since 2×3639469² = 26491469203922, which contains 22 as substring.

It is a Duffinian number.

3639469 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639409) 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, 95757 + ... + 95794.

It is an arithmetic number, because the mean of its divisors is an integer number (957760).

Almost surely, 2^3639469 is an apocalyptic number.

It is an amenable number.

3639469 is a deficient number, since it is larger than the sum of its proper divisors (191571).

3639469 is a wasteful number, since it uses less digits than its factorization.

3639469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191570.

The product of its digits is 104976, while the sum is 40.

The square root of 3639469 is about 1907.7392379463. The cubic root of 3639469 is about 153.8199531856.

It can be divided in two parts, 36394 and 69, that added together give a palindrome (36463).

The spelling of 3639469 in words is "three million, six hundred thirty-nine thousand, four hundred sixty-nine".