1172222789 has 16 divisors (see below), whose sum is σ = 1222057200. Its totient is φ = 1123476480.

The previous prime is 1172222741. The next prime is 1172222837. The reversal of 1172222789 is 9872222711.

It is an interprime number because it is at equal distance from previous prime (1172222741) and next prime (1172222837).

It can be written as a sum of positive squares in 8 ways, for example, as 290429764 + 881793025 = 17042^2 + 29695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172222789 - 2²⁸ = 903787333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172222719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 755987 + ... + 757535.

It is an arithmetic number, because the mean of its divisors is an integer number (76378575).

Almost surely, 2^1172222789 is an apocalyptic number.

It is an amenable number.

1172222789 is a deficient number, since it is larger than the sum of its proper divisors (49834411).

1172222789 is a wasteful number, since it uses less digits than its factorization.

1172222789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880.

The product of its digits is 56448, while the sum is 41.

The square root of 1172222789 is about 34237.7392507157. The cubic root of 1172222789 is about 1054.3951187700.

The spelling of 1172222789 in words is "one billion, one hundred seventy-two million, two hundred twenty-two thousand, seven hundred eighty-nine".