531982393 has 4 divisors (see below), whose sum is σ = 532145808. Its totient is φ = 531818980.

The previous prime is 531982379. The next prime is 531982447. The reversal of 531982393 is 393289135.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531982393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531982313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76723 + ... + 83368.

It is an arithmetic number, because the mean of its divisors is an integer number (133036452).

Almost surely, 2^531982393 is an apocalyptic number.

It is an amenable number.

531982393 is a deficient number, since it is larger than the sum of its proper divisors (163415).

531982393 is a wasteful number, since it uses less digits than its factorization.

531982393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163414.

The product of its digits is 174960, while the sum is 43.

The square root of 531982393 is about 23064.7435060527. The cubic root of 531982393 is about 810.2749627903.

The spelling of 531982393 in words is "five hundred thirty-one million, nine hundred eighty-two thousand, three hundred ninety-three".