531609079 has 2 divisors, whose sum is σ = 531609080. Its totient is φ = 531609078.

The previous prime is 531609041. The next prime is 531609139. The reversal of 531609079 is 970906135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531609079 - 2¹³ = 531600887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531609019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265804539 + 265804540.

It is an arithmetic number, because the mean of its divisors is an integer number (265804540).

Almost surely, 2^531609079 is an apocalyptic number.

531609079 is a deficient number, since it is larger than the sum of its proper divisors (1).

531609079 is an equidigital number, since it uses as much as digits as its factorization.

531609079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 531609079 is about 23056.6493446034. The cubic root of 531609079 is about 810.0853839779.

The spelling of 531609079 in words is "five hundred thirty-one million, six hundred nine thousand, seventy-nine".