984842981 has 2 divisors, whose sum is σ = 984842982. Its totient is φ = 984842980.

The previous prime is 984842977. The next prime is 984843007. The reversal of 984842981 is 189248489.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 623500900 + 361342081 = 24970^2 + 19009^2 .

It is an emirp because it is prime and its reverse (189248489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 984842981 - 2² = 984842977 is a prime.

It is a super-2 number, since 2×984842981² = 1939831394449932722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (984842381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492421490 + 492421491.

It is an arithmetic number, because the mean of its divisors is an integer number (492421491).

Almost surely, 2^984842981 is an apocalyptic number.

It is an amenable number.

984842981 is a deficient number, since it is larger than the sum of its proper divisors (1).

984842981 is an equidigital number, since it uses as much as digits as its factorization.

984842981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 53.

The square root of 984842981 is about 31382.2080325779. The cubic root of 984842981 is about 994.9219170563.

The spelling of 984842981 in words is "nine hundred eighty-four million, eight hundred forty-two thousand, nine hundred eighty-one".