1222235789 has 4 divisors (see below), whose sum is σ = 1252046460. Its totient is φ = 1192425120.

The previous prime is 1222235783. The next prime is 1222235797. The reversal of 1222235789 is 9875322221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25421764 + 1196814025 = 5042^2 + 34595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222235789 - 2⁸ = 1222235533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 29810629 = 1222235789 / (1 + 2 + 2 + 2 + 2 + 3 + 5 + 7 + 8 + 9).

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222235783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14905274 + ... + 14905355.

It is an arithmetic number, because the mean of its divisors is an integer number (313011615).

Almost surely, 2^1222235789 is an apocalyptic number.

It is an amenable number.

1222235789 is a deficient number, since it is larger than the sum of its proper divisors (29810671).

1222235789 is an equidigital number, since it uses as much as digits as its factorization.

1222235789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29810670.

The product of its digits is 120960, while the sum is 41.

The square root of 1222235789 is about 34960.4889696926. The cubic root of 1222235789 is about 1069.1820659754.

The spelling of 1222235789 in words is "one billion, two hundred twenty-two million, two hundred thirty-five thousand, seven hundred eighty-nine".