982513981 has 2 divisors, whose sum is σ = 982513982. Its totient is φ = 982513980.

The previous prime is 982513979. The next prime is 982513993. The reversal of 982513981 is 189315289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663320025 + 319193956 = 25755^2 + 17866^2 .

It is an emirp because it is prime and its reverse (189315289) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 982513981 - 2¹ = 982513979 is a prime.

It is a super-2 number, since 2×982513981² = 1930667445720936722, which contains 22 as substring.

Together with 982513979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (982513951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491256990 + 491256991.

It is an arithmetic number, because the mean of its divisors is an integer number (491256991).

Almost surely, 2^982513981 is an apocalyptic number.

It is an amenable number.

982513981 is a deficient number, since it is larger than the sum of its proper divisors (1).

982513981 is an equidigital number, since it uses as much as digits as its factorization.

982513981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 46.

The square root of 982513981 is about 31345.0790555711. The cubic root of 982513981 is about 994.1370196404.

The spelling of 982513981 in words is "nine hundred eighty-two million, five hundred thirteen thousand, nine hundred eighty-one".