533649 has 4 divisors (see below), whose sum is σ = 711536. Its totient is φ = 355764.

The previous prime is 533641. The next prime is 533671. The reversal of 533649 is 946335.

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.

It is not a de Polignac number, because 533649 - 2³ = 533641 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (533641) 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, 88939 + ... + 88944.

It is an arithmetic number, because the mean of its divisors is an integer number (177884).

2⁵³³⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

533649 is a deficient number, since it is larger than the sum of its proper divisors (177887).

533649 is a wasteful number, since it uses less digits than its factorization.

533649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177886.

The product of its digits is 9720, while the sum is 30.

The square root of 533649 is about 730.5128335628. The cubic root of 533649 is about 81.1120230224.

Subtracting 533649 from its reverse (946335), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 533649 in words is "five hundred thirty-three thousand, six hundred forty-nine".