1171898289 has 9 divisors (see below), whose sum is σ = 1692890329. Its totient is φ = 781197060.

The previous prime is 1171898269. The next prime is 1171898303. The reversal of 1171898289 is 9828981711.

The square root of 1171898289 is 34233.

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 1171898289 - 2¹⁷ = 1171767217 is a prime.

It is a super-2 number, since 2×1171898289² = 2746691199522255042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171898209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 96994 + ... + 108404.

Almost surely, 2^1171898289 is an apocalyptic number.

1171898289 is the 34233-rd square number.

1171898289 is the 17117-th centered octagonal number.

It is an amenable number.

1171898289 is a deficient number, since it is larger than the sum of its proper divisors (520992040).

1171898289 is an frugal number, since it uses more digits than its factorization.

1171898289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22828 (or 11414 counting only the distinct ones).

The product of its digits is 580608, while the sum is 54.

The cubic root of 1171898289 is about 1054.2978156532.

The spelling of 1171898289 in words is "one billion, one hundred seventy-one million, eight hundred ninety-eight thousand, two hundred eighty-nine".