9019870729 has 9 divisors (see below), whose sum is σ = 9152157909. Its totient is φ = 8889472800.

The previous prime is 9019870723. The next prime is 9019870753. The reversal of 9019870729 is 9270789109.

The square root of 9019870729 is 94973.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3551564025 + 5468306704 = 59595^2 + 73948^2 .

It is not a de Polignac number, because 9019870729 - 2⁵ = 9019870697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9019870723) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6932379 + ... + 6933679.

Almost surely, 2^9019870729 is an apocalyptic number.

9019870729 is the 94973-rd square number.

9019870729 is the 47487-th centered octagonal number.

It is an amenable number.

9019870729 is a deficient number, since it is larger than the sum of its proper divisors (132287180).

9019870729 is an frugal number, since it uses more digits than its factorization.

9019870729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748 (or 1374 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 52.

The cubic root of 9019870729 is about 2081.6135415786.

The spelling of 9019870729 in words is "nine billion, nineteen million, eight hundred seventy thousand, seven hundred twenty-nine".