531830491 has 2 divisors, whose sum is σ = 531830492. Its totient is φ = 531830490.

The previous prime is 531830483. The next prime is 531830503. The reversal of 531830491 is 194038135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531830491 - 2³ = 531830483 is a prime.

It is not a weakly prime, because it can be changed into another prime (531830401) 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, 265915245 + 265915246.

It is an arithmetic number, because the mean of its divisors is an integer number (265915246).

Almost surely, 2^531830491 is an apocalyptic number.

531830491 is a deficient number, since it is larger than the sum of its proper divisors (1).

531830491 is an equidigital number, since it uses as much as digits as its factorization.

531830491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 531830491 is about 23061.4503229957. The cubic root of 531830491 is about 810.1978336059.

The spelling of 531830491 in words is "five hundred thirty-one million, eight hundred thirty thousand, four hundred ninety-one".