3646549 has 4 divisors (see below), whose sum is σ = 3652960. Its totient is φ = 3640140.

The previous prime is 3646541. The next prime is 3646553. The reversal of 3646549 is 9456463.

It is a happy number.

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: 9456463 = 619 ⋅15277.

It is a cyclic number.

It is not a de Polignac number, because 3646549 - 2³ = 3646541 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 (3646541) 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, 2259 + ... + 3520.

It is an arithmetic number, because the mean of its divisors is an integer number (913240).

Almost surely, 2^3646549 is an apocalyptic number.

It is an amenable number.

3646549 is a deficient number, since it is larger than the sum of its proper divisors (6411).

3646549 is an equidigital number, since it uses as much as digits as its factorization.

3646549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410.

The product of its digits is 77760, while the sum is 37.

The square root of 3646549 is about 1909.5939358932. The cubic root of 3646549 is about 153.9196325476.

It can be divided in two parts, 364 and 6549, that multiplied together give a triangular number (2383836 = T₂₁₈₃).

The spelling of 3646549 in words is "three million, six hundred forty-six thousand, five hundred forty-nine".