531049787 has 2 divisors, whose sum is σ = 531049788. Its totient is φ = 531049786.

The previous prime is 531049781. The next prime is 531049823. The reversal of 531049787 is 787940135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531049787 - 2¹⁸ = 530787643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531049781) 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, 265524893 + 265524894.

It is an arithmetic number, because the mean of its divisors is an integer number (265524894).

Almost surely, 2^531049787 is an apocalyptic number.

531049787 is a deficient number, since it is larger than the sum of its proper divisors (1).

531049787 is an equidigital number, since it uses as much as digits as its factorization.

531049787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 531049787 is about 23044.5175041701. The cubic root of 531049787 is about 809.8011944141.

The spelling of 531049787 in words is "five hundred thirty-one million, forty-nine thousand, seven hundred eighty-seven".