9968013987 has 4 divisors (see below), whose sum is σ = 13290685320. Its totient is φ = 6645342656.

The previous prime is 9968013983. The next prime is 9968013989. The reversal of 9968013987 is 7893108699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9968013987 - 2² = 9968013983 is a prime.

It is a super-2 number, since 2×9968013987² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9968013987.

It is not an unprimeable number, because it can be changed into a prime (9968013983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1661335662 + ... + 1661335667.

It is an arithmetic number, because the mean of its divisors is an integer number (3322671330).

Almost surely, 2^9968013987 is an apocalyptic number.

9968013987 is a deficient number, since it is larger than the sum of its proper divisors (3322671333).

9968013987 is a wasteful number, since it uses less digits than its factorization.

9968013987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322671332.

The product of its (nonzero) digits is 5878656, while the sum is 60.

The square root of 9968013987 is about 99839.9418419302. The cubic root of 9968013987 is about 2152.1351773449.

The spelling of 9968013987 in words is "nine billion, nine hundred sixty-eight million, thirteen thousand, nine hundred eighty-seven".