39478680989 has 4 divisors (see below), whose sum is σ = 43067652000. Its totient is φ = 35889709980.

The previous prime is 39478680973. The next prime is 39478681003. The reversal of 39478680989 is 98908687493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39478680989 - 2⁴ = 39478680973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39478680289) 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 in 3 ways as a sum of consecutive naturals, for example, 1794485489 + ... + 1794485510.

It is an arithmetic number, because the mean of its divisors is an integer number (10766913000).

Almost surely, 2^39478680989 is an apocalyptic number.

It is an amenable number.

39478680989 is a deficient number, since it is larger than the sum of its proper divisors (3588971011).

39478680989 is a wasteful number, since it uses less digits than its factorization.

39478680989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588971010.

The product of its (nonzero) digits is 188116992, while the sum is 71.

The spelling of 39478680989 in words is "thirty-nine billion, four hundred seventy-eight million, six hundred eighty thousand, nine hundred eighty-nine".