1011430809 has 9 divisors (see below), whose sum is σ = 1461093439. Its totient is φ = 674223600.

The previous prime is 1011430789. The next prime is 1011430843. The reversal of 1011430809 is 9080341101.

The square root of 1011430809 is 31803.

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

1011430809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 864536409 + 146894400 = 29403^2 + 12120^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1011430809 - 2¹⁵ = 1011398041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011430009) 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, 90109 + ... + 100709.

Almost surely, 2^1011430809 is an apocalyptic number.

1011430809 is the 31803-rd square number.

1011430809 is the 15902-nd centered octagonal number.

It is an amenable number.

1011430809 is a deficient number, since it is larger than the sum of its proper divisors (449662630).

1011430809 is an frugal number, since it uses more digits than its factorization.

1011430809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21208 (or 10604 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The cubic root of 1011430809 is about 1003.7958430118.

The spelling of 1011430809 in words is "one billion, eleven million, four hundred thirty thousand, eight hundred nine".