3621389 has 4 divisors (see below), whose sum is σ = 3738240. Its totient is φ = 3504540.

The previous prime is 3621379. The next prime is 3621403. The reversal of 3621389 is 9831263.

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: 9831263 = 13 ⋅756251.

It is a cyclic number.

It is not a de Polignac number, because 3621389 - 2¹² = 3617293 is a prime.

It is a super-2 number, since 2×3621389² = 26228916578642, 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 (3621329) 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, 58379 + ... + 58440.

It is an arithmetic number, because the mean of its divisors is an integer number (934560).

Almost surely, 2^3621389 is an apocalyptic number.

It is an amenable number.

3621389 is a deficient number, since it is larger than the sum of its proper divisors (116851).

3621389 is a wasteful number, since it uses less digits than its factorization.

3621389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116850.

The product of its digits is 7776, while the sum is 32.

The square root of 3621389 is about 1902.9947451320. The cubic root of 3621389 is about 153.5648168160.

The spelling of 3621389 in words is "three million, six hundred twenty-one thousand, three hundred eighty-nine".