531648959 has 4 divisors (see below), whose sum is σ = 535707480. Its totient is φ = 527590440.

The previous prime is 531648911. The next prime is 531649021. The reversal of 531648959 is 959846135.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 531648959 - 2²⁰ = 530600383 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 (531648659) 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, 2029064 + ... + 2029325.

It is an arithmetic number, because the mean of its divisors is an integer number (133926870).

Almost surely, 2^531648959 is an apocalyptic number.

531648959 is a deficient number, since it is larger than the sum of its proper divisors (4058521).

531648959 is a wasteful number, since it uses less digits than its factorization.

531648959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058520.

The product of its digits is 1166400, while the sum is 50.

The square root of 531648959 is about 23057.5141548260. The cubic root of 531648959 is about 810.1056403395.

The spelling of 531648959 in words is "five hundred thirty-one million, six hundred forty-eight thousand, nine hundred fifty-nine".