531394393 has 4 divisors (see below), whose sum is σ = 533415168. Its totient is φ = 529373620.

The previous prime is 531394379. The next prime is 531394417. The reversal of 531394393 is 393493135.

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 not a de Polignac number, because 531394393 - 2¹⁷ = 531263321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531395393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009993 + ... + 1010518.

It is an arithmetic number, because the mean of its divisors is an integer number (133353792).

Almost surely, 2^531394393 is an apocalyptic number.

It is an amenable number.

531394393 is a deficient number, since it is larger than the sum of its proper divisors (2020775).

531394393 is a wasteful number, since it uses less digits than its factorization.

531394393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020774.

The product of its digits is 131220, while the sum is 40.

The square root of 531394393 is about 23051.9932543804. The cubic root of 531394393 is about 809.9763204986.

The spelling of 531394393 in words is "five hundred thirty-one million, three hundred ninety-four thousand, three hundred ninety-three".