531989803 has 2 divisors, whose sum is σ = 531989804. Its totient is φ = 531989802.

The previous prime is 531989771. The next prime is 531989813. The reversal of 531989803 is 308989135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531989803 - 2⁵ = 531989771 is a prime.

It is not a weakly prime, because it can be changed into another prime (531989813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265994901 + 265994902.

It is an arithmetic number, because the mean of its divisors is an integer number (265994902).

Almost surely, 2^531989803 is an apocalyptic number.

531989803 is a deficient number, since it is larger than the sum of its proper divisors (1).

531989803 is an equidigital number, since it uses as much as digits as its factorization.

531989803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 531989803 is about 23064.9041402734. The cubic root of 531989803 is about 810.2787248883.

It can be divided in two parts, 53198 and 9803, that added together give a square (63001 = 251²).

The spelling of 531989803 in words is "five hundred thirty-one million, nine hundred eighty-nine thousand, eight hundred three".