39968486993 has 4 divisors (see below), whose sum is σ = 39968920740. Its totient is φ = 39968053248.

The previous prime is 39968486977. The next prime is 39968487079.

39968486993 is nontrivially palindromic in base 10.

39968486993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26103895489 + 13864591504 = 161567^2 + 117748^2 .

It is a cyclic number.

It is not a de Polignac number, because 39968486993 - 2⁴ = 39968486977 is a prime.

It is a super-2 number, since 2×39968486993² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39968486993.

It is not an unprimeable number, because it can be changed into a prime (39968476993) 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, 17648 + ... + 283281.

It is an arithmetic number, because the mean of its divisors is an integer number (9992230185).

Almost surely, 2^39968486993 is an apocalyptic number.

It is an amenable number.

39968486993 is a deficient number, since it is larger than the sum of its proper divisors (433747).

39968486993 is a wasteful number, since it uses less digits than its factorization.

39968486993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433746.

The product of its digits is 544195584, while the sum is 74.

The spelling of 39968486993 in words is "thirty-nine billion, nine hundred sixty-eight million, four hundred eighty-six thousand, nine hundred ninety-three".