2731247729 has 8 divisors (see below), whose sum is σ = 3128879040. Its totient is φ = 2335479696.

The previous prime is 2731247699. The next prime is 2731247747. The reversal of 2731247729 is 9277421372.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2731247729 - 2¹² = 2731243633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2731247729.

It is not an unprimeable number, because it can be changed into a prime (2731247749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462674 + ... + 468539.

It is an arithmetic number, because the mean of its divisors is an integer number (391109880).

Almost surely, 2^2731247729 is an apocalyptic number.

It is an amenable number.

2731247729 is a deficient number, since it is larger than the sum of its proper divisors (397631311).

2731247729 is an equidigital number, since it uses as much as digits as its factorization.

2731247729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931639.

The product of its digits is 296352, while the sum is 44.

The square root of 2731247729 is about 52261.3406735801. The cubic root of 2731247729 is about 1397.8278780903.

The spelling of 2731247729 in words is "two billion, seven hundred thirty-one million, two hundred forty-seven thousand, seven hundred twenty-nine".