981559463 has 2 divisors, whose sum is σ = 981559464. Its totient is φ = 981559462.

The previous prime is 981559441. The next prime is 981559487. The reversal of 981559463 is 364955189.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (364955189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981559463 - 2¹⁰ = 981558439 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981559763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490779731 + 490779732.

It is an arithmetic number, because the mean of its divisors is an integer number (490779732).

Almost surely, 2^981559463 is an apocalyptic number.

981559463 is a deficient number, since it is larger than the sum of its proper divisors (1).

981559463 is an equidigital number, since it uses as much as digits as its factorization.

981559463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 50.

The square root of 981559463 is about 31329.8493931905. The cubic root of 981559463 is about 993.8149787133.

The spelling of 981559463 in words is "nine hundred eighty-one million, five hundred fifty-nine thousand, four hundred sixty-three".