1729018849 has 4 divisors (see below), whose sum is σ = 1729130436. Its totient is φ = 1728907264.

The previous prime is 1729018787. The next prime is 1729018877. The reversal of 1729018849 is 9488109271.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 352237824 + 1376781025 = 18768^2 + 37105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1729018849 - 2¹⁵ = 1728986081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1729088849) 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, 27904 + ... + 65089.

It is an arithmetic number, because the mean of its divisors is an integer number (432282609).

Almost surely, 2^1729018849 is an apocalyptic number.

It is an amenable number.

1729018849 is a deficient number, since it is larger than the sum of its proper divisors (111587).

1729018849 is an equidigital number, since it uses as much as digits as its factorization.

1729018849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111586.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 1729018849 is about 41581.4724246268. The cubic root of 1729018849 is about 1200.2357983388.

The spelling of 1729018849 in words is "one billion, seven hundred twenty-nine million, eighteen thousand, eight hundred forty-nine".