531383939 has 2 divisors, whose sum is σ = 531383940. Its totient is φ = 531383938.

The previous prime is 531383933. The next prime is 531383953. The reversal of 531383939 is 939383135.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531383939 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531383939.

It is not a weakly prime, because it can be changed into another prime (531383933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265691969 + 265691970.

It is an arithmetic number, because the mean of its divisors is an integer number (265691970).

Almost surely, 2^531383939 is an apocalyptic number.

531383939 is a deficient number, since it is larger than the sum of its proper divisors (1).

531383939 is an equidigital number, since it uses as much as digits as its factorization.

531383939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 44.

The square root of 531383939 is about 23051.7665049774. The cubic root of 531383939 is about 809.9710089710.

The spelling of 531383939 in words is "five hundred thirty-one million, three hundred eighty-three thousand, nine hundred thirty-nine".