3649619 has 4 divisors (see below), whose sum is σ = 3653520. Its totient is φ = 3645720.

The previous prime is 3649609. The next prime is 3649637. The reversal of 3649619 is 9169463.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9169463 = 2237 ⋅4099.

It is a cyclic number.

It is not a de Polignac number, because 3649619 - 2⁸ = 3649363 is a prime.

It is a super-2 number, since 2×3649619² = 26639437690322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3649609) 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, 389 + ... + 2729.

It is an arithmetic number, because the mean of its divisors is an integer number (913380).

Almost surely, 2^3649619 is an apocalyptic number.

3649619 is a deficient number, since it is larger than the sum of its proper divisors (3901).

3649619 is a wasteful number, since it uses less digits than its factorization.

3649619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900.

The product of its digits is 34992, while the sum is 38.

The square root of 3649619 is about 1910.3976025948. The cubic root of 3649619 is about 153.9628149946.

The spelling of 3649619 in words is "three million, six hundred forty-nine thousand, six hundred nineteen".