1123321279 has 2 divisors, whose sum is σ = 1123321280. Its totient is φ = 1123321278.

The previous prime is 1123321267. The next prime is 1123321319. The reversal of 1123321279 is 9721233211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123321279 - 2⁷ = 1123321151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123321279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123321879) 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 as a sum of consecutive naturals, namely, 561660639 + 561660640.

It is an arithmetic number, because the mean of its divisors is an integer number (561660640).

Almost surely, 2^1123321279 is an apocalyptic number.

1123321279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123321279 is an equidigital number, since it uses as much as digits as its factorization.

1123321279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 1123321279 is about 33515.9854248685. The cubic root of 1123321279 is about 1039.5243383861.

It can be divided in two parts, 1123321 and 279, that added together give a square (1123600 = 1060²).

The spelling of 1123321279 in words is "one billion, one hundred twenty-three million, three hundred twenty-one thousand, two hundred seventy-nine".