3129273729313 has 4 divisors (see below), whose sum is σ = 3180573298708. Its totient is φ = 3077974159920.

The previous prime is 3129273729277. The next prime is 3129273729331. The reversal of 3129273729313 is 3139273729213.

It is a happy number.

3129273729313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 791117744704 + 2338155984609 = 889448^2 + 1529103^2 .

It is a cyclic number.

It is not a de Polignac number, because 3129273729313 - 2²¹ = 3129271632161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3129273129313) 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, 25649784606 + ... + 25649784727.

It is an arithmetic number, because the mean of its divisors is an integer number (795143324677).

Almost surely, 2^{3129273729313} is an apocalyptic number.

It is an amenable number.

3129273729313 is a deficient number, since it is larger than the sum of its proper divisors (51299569395).

3129273729313 is an equidigital number, since it uses as much as digits as its factorization.

3129273729313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51299569394.

The product of its digits is 2571912, while the sum is 52.

The spelling of 3129273729313 in words is "three trillion, one hundred twenty-nine billion, two hundred seventy-three million, seven hundred twenty-nine thousand, three hundred thirteen".