9189331321 has 9 divisors (see below), whose sum is σ = 9250025421. Its totient is φ = 9129034752.

The previous prime is 9189331313. The next prime is 9189331331. The reversal of 9189331321 is 1231339819.

The square root of 9189331321 is 95861.

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 3851567721 + 5337763600 = 62061^2 + 73060^2 .

It is not a de Polignac number, because 9189331321 - 2³ = 9189331313 is a prime.

It is a super-2 number, since 2×9189331321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9189331331) 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, 24636091 + ... + 24636463.

Almost surely, 2^9189331321 is an apocalyptic number.

9189331321 is the 95861-st square number.

9189331321 is the 47931-st centered octagonal number.

It is an amenable number.

9189331321 is a deficient number, since it is larger than the sum of its proper divisors (60694100).

9189331321 is an frugal number, since it uses more digits than its factorization.

9189331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 630 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The cubic root of 9189331321 is about 2094.5688319282.

The spelling of 9189331321 in words is "nine billion, one hundred eighty-nine million, three hundred thirty-one thousand, three hundred twenty-one".