1200830409 has 9 divisors (see below), whose sum is σ = 1734682989. Its totient is φ = 800484300.

The previous prime is 1200830399. The next prime is 1200830413. The reversal of 1200830409 is 9040380021.

The square root of 1200830409 is 34653.

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

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

It is not a de Polignac number, because 1200830409 - 2²³ = 1192441801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200830209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 98184 + ... + 109734.

Almost surely, 2^1200830409 is an apocalyptic number.

1200830409 is the 34653-rd square number.

1200830409 is the 17327-th centered octagonal number.

It is an amenable number.

1200830409 is a deficient number, since it is larger than the sum of its proper divisors (533852580).

1200830409 is an frugal number, since it uses more digits than its factorization.

1200830409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23108 (or 11554 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The cubic root of 1200830409 is about 1062.9036352287.

The spelling of 1200830409 in words is "one billion, two hundred million, eight hundred thirty thousand, four hundred nine".