333649 has 4 divisors (see below), whose sum is σ = 336820. Its totient is φ = 330480.

The previous prime is 333647. The next prime is 333667. The reversal of 333649 is 946333.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946333 = 19 ⋅49807.

It can be written as a sum of positive squares in 2 ways, for example, as 283024 + 50625 = 532^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 333649 - 2¹ = 333647 is a prime.

It is a super-2 number, since 2×333649² = 222643310402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (333647) 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, 1422 + ... + 1639.

It is an arithmetic number, because the mean of its divisors is an integer number (84205).

2³³³⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

333649 is a deficient number, since it is larger than the sum of its proper divisors (3171).

333649 is a wasteful number, since it uses less digits than its factorization.

333649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170.

The product of its digits is 5832, while the sum is 28.

The square root of 333649 is about 577.6235798511. The cubic root of 333649 is about 69.3580076339.

The spelling of 333649 in words is "three hundred thirty-three thousand, six hundred forty-nine".