1159198209 has 63 divisors (see below), whose sum is σ = 1901580633. Its totient is φ = 705998592.

The previous prime is 1159198163. The next prime is 1159198231. The reversal of 1159198209 is 9028919511.

The square root of 1159198209 is 34047.

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 211789809 + 947408400 = 14553^2 + 30780^2 .

It is not a de Polignac number, because 1159198209 - 2⁷ = 1159198081 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1159198279) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 11950449 + ... + 11950545.

Almost surely, 2^1159198209 is an apocalyptic number.

1159198209 is the 34047-th square number.

1159198209 is the 17024-th centered octagonal number.

It is an amenable number.

1159198209 is a deficient number, since it is larger than the sum of its proper divisors (742382424).

1159198209 is an frugal number, since it uses more digits than its factorization.

1159198209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 45.

The cubic root of 1159198209 is about 1050.4754336736.

The spelling of 1159198209 in words is "one billion, one hundred fifty-nine million, one hundred ninety-eight thousand, two hundred nine".