39620544973 has 4 divisors (see below), whose sum is σ = 39627301660. Its totient is φ = 39613788288.

The previous prime is 39620544967. The next prime is 39620545001. The reversal of 39620544973 is 37944502693.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7885972809 + 31734572164 = 88803^2 + 178142^2 .

It is a cyclic number.

It is not a de Polignac number, because 39620544973 - 2²¹ = 39618447821 is a prime.

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 39620544973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39620544673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3369540 + ... + 3381277.

It is an arithmetic number, because the mean of its divisors is an integer number (9906825415).

Almost surely, 2^39620544973 is an apocalyptic number.

It is an amenable number.

39620544973 is a deficient number, since it is larger than the sum of its proper divisors (6756687).

39620544973 is an equidigital number, since it uses as much as digits as its factorization.

39620544973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6756686.

The product of its (nonzero) digits is 4898880, while the sum is 52.

The spelling of 39620544973 in words is "thirty-nine billion, six hundred twenty million, five hundred forty-four thousand, nine hundred seventy-three".