1199469611209 has 9 divisors (see below), whose sum is σ = 1207632225639. Its totient is φ = 1191361823400.

The previous prime is 1199469611191. The next prime is 1199469611213. The reversal of 1199469611209 is 9021169649911.

The square root of 1199469611209 is 1095203.

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

It can be written as a sum of positive squares in only one way, i.e., 875057348025 + 324412263184 = 935445^2 + 569572^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1199469611209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1199469611299) 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, 165372027 + ... + 165379279.

Almost surely, 2^{1199469611209} is an apocalyptic number.

1199469611209 is the 1095203-rd square number.

1199469611209 is the 547602-nd centered octagonal number.

It is an amenable number.

1199469611209 is a deficient number, since it is larger than the sum of its proper divisors (8162614430).

1199469611209 is an frugal number, since it uses more digits than its factorization.

1199469611209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14808 (or 7404 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 58.

The spelling of 1199469611209 in words is "one trillion, one hundred ninety-nine billion, four hundred sixty-nine million, six hundred eleven thousand, two hundred nine".