981480881 has 2 divisors, whose sum is σ = 981480882. Its totient is φ = 981480880.

The previous prime is 981480821. The next prime is 981480883. The reversal of 981480881 is 188084189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504451600 + 477029281 = 22460^2 + 21841^2 .

It is an emirp because it is prime and its reverse (188084189) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981480881 is a prime.

It is a super-2 number, since 2×981480881² = 1926609439537072322, which contains 22 as substring.

Together with 981480883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (981480883) 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, 490740440 + 490740441.

It is an arithmetic number, because the mean of its divisors is an integer number (490740441).

Almost surely, 2^981480881 is an apocalyptic number.

It is an amenable number.

981480881 is a deficient number, since it is larger than the sum of its proper divisors (1).

981480881 is an equidigital number, since it uses as much as digits as its factorization.

981480881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 47.

The square root of 981480881 is about 31328.5952605603. The cubic root of 981480881 is about 993.7884569535.

The spelling of 981480881 in words is "nine hundred eighty-one million, four hundred eighty thousand, eight hundred eighty-one".