981888559 has 2 divisors, whose sum is σ = 981888560. Its totient is φ = 981888558.

The previous prime is 981888539. The next prime is 981888571. The reversal of 981888559 is 955888189.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981888559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981888497 and 981888506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981888529) 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, 490944279 + 490944280.

It is an arithmetic number, because the mean of its divisors is an integer number (490944280).

Almost surely, 2^981888559 is an apocalyptic number.

981888559 is a deficient number, since it is larger than the sum of its proper divisors (1).

981888559 is an equidigital number, since it uses as much as digits as its factorization.

981888559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8294400, while the sum is 61.

The square root of 981888559 is about 31335.1010689291. The cubic root of 981888559 is about 993.9260346405.

The spelling of 981888559 in words is "nine hundred eighty-one million, eight hundred eighty-eight thousand, five hundred fifty-nine".