1002010981 has 2 divisors, whose sum is σ = 1002010982. Its totient is φ = 1002010980.

The previous prime is 1002010979. The next prime is 1002011011. The reversal of 1002010981 is 1890102001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605602881 + 396408100 = 24609^2 + 19910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002010981 - 2¹ = 1002010979 is a prime.

It is a super-2 number, since 2×1002010981² = 2008052012089164722, which contains 22 as substring.

Together with 1002010979, 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 (1002010901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501005490 + 501005491.

It is an arithmetic number, because the mean of its divisors is an integer number (501005491).

Almost surely, 2^1002010981 is an apocalyptic number.

It is an amenable number.

1002010981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002010981 is an equidigital number, since it uses as much as digits as its factorization.

1002010981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1002010981 is about 31654.5570337037. The cubic root of 1002010981 is about 1000.6698781630.

Adding to 1002010981 its reverse (1890102001), we get a palindrome (2892112982).

The spelling of 1002010981 in words is "one billion, two million, ten thousand, nine hundred eighty-one".