2729773729 has 8 divisors (see below), whose sum is σ = 2779368488. Its totient is φ = 2680335360.

The previous prime is 2729773693. The next prime is 2729773751. The reversal of 2729773729 is 9273779272.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 182250000 + 2547523729 = 13500^2 + 50473^2 .

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 2729773729 - 2⁹ = 2729773217 is a prime.

It is a super-2 number, since 2×2729773729² = 14903329223077130882, which contains 22 as substring.

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 2729773729.

It is not an unprimeable number, because it can be changed into a prime (2729771729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3582 + ... + 73975.

It is an arithmetic number, because the mean of its divisors is an integer number (347421061).

Almost surely, 2^2729773729 is an apocalyptic number.

It is an amenable number.

2729773729 is a deficient number, since it is larger than the sum of its proper divisors (49594759).

2729773729 is an equidigital number, since it uses as much as digits as its factorization.

2729773729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78195.

The product of its digits is 4667544, while the sum is 55.

The square root of 2729773729 is about 52247.2365680712. The cubic root of 2729773729 is about 1397.5763728859.

The spelling of 2729773729 in words is "two billion, seven hundred twenty-nine million, seven hundred seventy-three thousand, seven hundred twenty-nine".