1979736105729 has 4 divisors (see below), whose sum is σ = 2639648140976. Its totient is φ = 1319824070484.

The previous prime is 1979736105727. The next prime is 1979736105797. The reversal of 1979736105729 is 9275016379791.

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 not a de Polignac number, because 1979736105729 - 2¹ = 1979736105727 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 1979736105729.

It is not an unprimeable number, because it can be changed into a prime (1979736105727) 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, 329956017619 + ... + 329956017624.

It is an arithmetic number, because the mean of its divisors is an integer number (659912035244).

Almost surely, 2^{1979736105729} is an apocalyptic number.

It is an amenable number.

1979736105729 is a deficient number, since it is larger than the sum of its proper divisors (659912035247).

1979736105729 is an equidigital number, since it uses as much as digits as its factorization.

1979736105729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659912035246.

The product of its (nonzero) digits is 45008460, while the sum is 66.

The spelling of 1979736105729 in words is "one trillion, nine hundred seventy-nine billion, seven hundred thirty-six million, one hundred five thousand, seven hundred twenty-nine".