2731729673 has 4 divisors (see below), whose sum is σ = 2798357268. Its totient is φ = 2665102080.

The previous prime is 2731729667. The next prime is 2731729681. The reversal of 2731729673 is 3769271372.

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 893292544 + 1838437129 = 29888^2 + 42877^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731729673 - 2¹⁶ = 2731664137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2731749673) 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, 33313736 + ... + 33313817.

It is an arithmetic number, because the mean of its divisors is an integer number (699589317).

Almost surely, 2^2731729673 is an apocalyptic number.

It is an amenable number.

2731729673 is a deficient number, since it is larger than the sum of its proper divisors (66627595).

2731729673 is an equidigital number, since it uses as much as digits as its factorization.

2731729673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66627594.

The product of its digits is 666792, while the sum is 47.

The square root of 2731729673 is about 52265.9513737194. The cubic root of 2731729673 is about 1397.9100914479.

The spelling of 2731729673 in words is "two billion, seven hundred thirty-one million, seven hundred twenty-nine thousand, six hundred seventy-three".