981481559 has 2 divisors, whose sum is σ = 981481560. Its totient is φ = 981481558.

The previous prime is 981481477. The next prime is 981481561. The reversal of 981481559 is 955184189.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981481559 is a prime.

Together with 981481561, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981481759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490740779 + 490740780.

It is an arithmetic number, because the mean of its divisors is an integer number (490740780).

Almost surely, 2^981481559 is an apocalyptic number.

981481559 is a deficient number, since it is larger than the sum of its proper divisors (1).

981481559 is an equidigital number, since it uses as much as digits as its factorization.

981481559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 50.

The square root of 981481559 is about 31328.6060813436. The cubic root of 981481559 is about 993.7886857875.

The spelling of 981481559 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, five hundred fifty-nine".