1018219729 has 16 divisors (see below), whose sum is σ = 1085270400. Its totient is φ = 954967728.

The previous prime is 1018219721. The next prime is 1018219739. The reversal of 1018219729 is 9279128101.

1018219729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1018219729 - 2³ = 1018219721 is a prime.

It is a super-3 number, since 3×1018219729³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1018219691 and 1018219700.

It is not an unprimeable number, because it can be changed into a prime (1018219721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644062 + ... + 645640.

It is an arithmetic number, because the mean of its divisors is an integer number (67829400).

Almost surely, 2^1018219729 is an apocalyptic number.

It is an amenable number.

1018219729 is a deficient number, since it is larger than the sum of its proper divisors (67050671).

1018219729 is an frugal number, since it uses more digits than its factorization.

1018219729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1018219729 is about 31909.5554497395. Note that the first 3 decimals coincide. The cubic root of 1018219729 is about 1006.0367275897.

The spelling of 1018219729 in words is "one billion, eighteen million, two hundred nineteen thousand, seven hundred twenty-nine".