1212223489 has 9 divisors (see below), whose sum is σ = 1247197161. Its totient is φ = 1178207280.

The previous prime is 1212223477. The next prime is 1212223559. The reversal of 1212223489 is 9843222121.

It is a happy number.

The square root of 1212223489 is 34817.

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 360050625 + 852172864 = 18975^2 + 29192^2 .

It is not a de Polignac number, because 1212223489 - 2⁵ = 1212223457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212223409) 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, 1287759 + ... + 1288699.

Almost surely, 2^1212223489 is an apocalyptic number.

1212223489 is the 34817-th square number.

1212223489 is the 17409-th centered octagonal number.

It is an amenable number.

1212223489 is a deficient number, since it is larger than the sum of its proper divisors (34973672).

1212223489 is an frugal number, since it uses more digits than its factorization.

1212223489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956 (or 978 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The cubic root of 1212223489 is about 1066.2545522011.

The spelling of 1212223489 in words is "one billion, two hundred twelve million, two hundred twenty-three thousand, four hundred eighty-nine".