1111222789 has 4 divisors (see below), whose sum is σ = 1114520524. Its totient is φ = 1107925056.

The previous prime is 1111222781. The next prime is 1111222793. The reversal of 1111222789 is 9872221111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9872221111 = 1871 ⋅5276441.

It can be written as a sum of positive squares in 2 ways, for example, as 685130625 + 426092164 = 26175^2 + 20642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111222789 - 2³ = 1111222781 is a prime.

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 (1111222781) 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, 1648362 + ... + 1649035.

It is an arithmetic number, because the mean of its divisors is an integer number (278630131).

Almost surely, 2^1111222789 is an apocalyptic number.

It is an amenable number.

1111222789 is a deficient number, since it is larger than the sum of its proper divisors (3297735).

1111222789 is an equidigital number, since it uses as much as digits as its factorization.

1111222789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297734.

The product of its digits is 4032, while the sum is 34.

The square root of 1111222789 is about 33335.0084595759. The cubic root of 1111222789 is about 1035.7788684054.

The spelling of 1111222789 in words is "one billion, one hundred eleven million, two hundred twenty-two thousand, seven hundred eighty-nine".