1979831207573 has 4 divisors (see below), whose sum is σ = 2096291866860. Its totient is φ = 1863370548288.

The previous prime is 1979831207533. The next prime is 1979831207587. The reversal of 1979831207573 is 3757021389791.

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 1281057258244 + 698773949329 = 1131838^2 + 835927^2 .

It is a cyclic number.

It is not a de Polignac number, because 1979831207573 - 2²⁶ = 1979764098709 is a prime.

It is a super-2 number, since 2×1979831207573² (a number of 25 digits) contains 22 as substring.

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 (1979831207533) 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, 58230329618 + ... + 58230329651.

It is an arithmetic number, because the mean of its divisors is an integer number (524072966715).

Almost surely, 2^{1979831207573} is an apocalyptic number.

It is an amenable number.

1979831207573 is a deficient number, since it is larger than the sum of its proper divisors (116460659287).

1979831207573 is a wasteful number, since it uses less digits than its factorization.

1979831207573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116460659286.

The product of its (nonzero) digits is 20003760, while the sum is 62.

The spelling of 1979831207573 in words is "one trillion, nine hundred seventy-nine billion, eight hundred thirty-one million, two hundred seven thousand, five hundred seventy-three".