531422393 has 2 divisors, whose sum is σ = 531422394. Its totient is φ = 531422392.

The previous prime is 531422347. The next prime is 531422399. The reversal of 531422393 is 393224135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400480144 + 130942249 = 20012^2 + 11443^2 .

It is a cyclic number.

It is not a de Polignac number, because 531422393 - 2¹⁰ = 531421369 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (531422399) 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 as a sum of consecutive naturals, namely, 265711196 + 265711197.

It is an arithmetic number, because the mean of its divisors is an integer number (265711197).

Almost surely, 2^531422393 is an apocalyptic number.

It is an amenable number.

531422393 is a deficient number, since it is larger than the sum of its proper divisors (1).

531422393 is an equidigital number, since it uses as much as digits as its factorization.

531422393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 531422393 is about 23052.6005691332. The cubic root of 531422393 is about 809.9905465543.

The spelling of 531422393 in words is "five hundred thirty-one million, four hundred twenty-two thousand, three hundred ninety-three".