3646939 has 4 divisors (see below), whose sum is σ = 3651256. Its totient is φ = 3642624.

The previous prime is 3646931. The next prime is 3646957. The reversal of 3646939 is 9396463.

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: 9396463 = 211 ⋅44533.

It is a cyclic number.

It is not a de Polignac number, because 3646939 - 2³ = 3646931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3646931) 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, 429 + ... + 2734.

It is an arithmetic number, because the mean of its divisors is an integer number (912814).

Almost surely, 2^3646939 is an apocalyptic number.

3646939 is a deficient number, since it is larger than the sum of its proper divisors (4317).

3646939 is a wasteful number, since it uses less digits than its factorization.

3646939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316.

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

The square root of 3646939 is about 1909.6960491136. The cubic root of 3646939 is about 153.9251196092.

The spelling of 3646939 in words is "three million, six hundred forty-six thousand, nine hundred thirty-nine".