9981693013 has 2 divisors, whose sum is σ = 9981693014. Its totient is φ = 9981693012.

The previous prime is 9981693011. The next prime is 9981693041. The reversal of 9981693013 is 3103961899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6958562724 + 3023130289 = 83418^2 + 54983^2 .

It is an emirp because it is prime and its reverse (3103961899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9981693013 - 2¹ = 9981693011 is a prime.

Together with 9981693011, 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 (9981693011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4990846506 + 4990846507.

It is an arithmetic number, because the mean of its divisors is an integer number (4990846507).

Almost surely, 2^9981693013 is an apocalyptic number.

It is an amenable number.

9981693013 is a deficient number, since it is larger than the sum of its proper divisors (1).

9981693013 is an equidigital number, since it uses as much as digits as its factorization.

9981693013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 9981693013 is about 99908.4231333875. The cubic root of 9981693013 is about 2153.1191800087.

The spelling of 9981693013 in words is "nine billion, nine hundred eighty-one million, six hundred ninety-three thousand, thirteen".