39983773921 has 8 divisors (see below), whose sum is σ = 49210798784. Its totient is φ = 31635513360.

The previous prime is 39983773859. The next prime is 39983773939. The reversal of 39983773921 is 12937738993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39983773921 - 2¹⁷ = 39983642849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39983773921.

It is not an unprimeable number, because it can be changed into a prime (39983773121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219690975 + ... + 219691156.

It is an arithmetic number, because the mean of its divisors is an integer number (6151349848).

Almost surely, 2^39983773921 is an apocalyptic number.

It is an amenable number.

39983773921 is a deficient number, since it is larger than the sum of its proper divisors (9227024863).

39983773921 is a wasteful number, since it uses less digits than its factorization.

39983773921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439382151.

The product of its digits is 15431472, while the sum is 61.

The spelling of 39983773921 in words is "thirty-nine billion, nine hundred eighty-three million, seven hundred seventy-three thousand, nine hundred twenty-one".