3649189 has 4 divisors (see below), whose sum is σ = 3655756. Its totient is φ = 3642624.

The previous prime is 3649181. The next prime is 3649193. The reversal of 3649189 is 9819463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9819463 = 79 ⋅124297.

It can be written as a sum of positive squares in 2 ways, for example, as 20164 + 3629025 = 142^2 + 1905^2 .

It is a cyclic number.

It is not a de Polignac number, because 3649189 - 2³ = 3649181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649181) 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, 2364 + ... + 3589.

It is an arithmetic number, because the mean of its divisors is an integer number (913939).

Almost surely, 2^3649189 is an apocalyptic number.

It is an amenable number.

3649189 is a deficient number, since it is larger than the sum of its proper divisors (6567).

3649189 is an equidigital number, since it uses as much as digits as its factorization.

3649189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566.

The product of its digits is 46656, while the sum is 40.

The square root of 3649189 is about 1910.2850572624. The cubic root of 3649189 is about 153.9567680975.

The spelling of 3649189 in words is "three million, six hundred forty-nine thousand, one hundred eighty-nine".