39964159673 has 2 divisors, whose sum is σ = 39964159674. Its totient is φ = 39964159672.

The previous prime is 39964159667. The next prime is 39964159747. The reversal of 39964159673 is 37695146993.

39964159673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29195531689 + 10768627984 = 170867^2 + 103772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39964159673 is a prime.

It is not a weakly prime, because it can be changed into another prime (39964159603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19982079836 + 19982079837.

It is an arithmetic number, because the mean of its divisors is an integer number (19982079837).

Almost surely, 2^39964159673 is an apocalyptic number.

It is an amenable number.

39964159673 is a deficient number, since it is larger than the sum of its proper divisors (1).

39964159673 is an equidigital number, since it uses as much as digits as its factorization.

39964159673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33067440, while the sum is 62.

The spelling of 39964159673 in words is "thirty-nine billion, nine hundred sixty-four million, one hundred fifty-nine thousand, six hundred seventy-three".