1222691089 has 9 divisors (see below), whose sum is σ = 1242263163. Its totient is φ = 1203424272.

The previous prime is 1222691083. The next prime is 1222691101. The reversal of 1222691089 is 9801962221.

The square root of 1222691089 is 34967.

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., 694059025 + 528632064 = 26345^2 + 22992^2 .

It is not a de Polignac number, because 1222691089 - 2³ = 1222691081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222691081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2552352 + ... + 2552830.

Almost surely, 2^1222691089 is an apocalyptic number.

1222691089 is the 34967-th square number.

1222691089 is the 17484-th centered octagonal number.

It is an amenable number.

1222691089 is a deficient number, since it is larger than the sum of its proper divisors (19572074).

1222691089 is an frugal number, since it uses more digits than its factorization.

1222691089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The cubic root of 1222691089 is about 1069.3148112730.

The spelling of 1222691089 in words is "one billion, two hundred twenty-two million, six hundred ninety-one thousand, eighty-nine".