1123079989 has 2 divisors, whose sum is σ = 1123079990. Its totient is φ = 1123079988.

The previous prime is 1123079957. The next prime is 1123080001. The reversal of 1123079989 is 9899703211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608016964 + 515063025 = 24658^2 + 22695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123079989 - 2⁵ = 1123079957 is a prime.

It is a super-2 number, since 2×1123079989² = 2522617323384480242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123079689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561539994 + 561539995.

It is an arithmetic number, because the mean of its divisors is an integer number (561539995).

Almost surely, 2^1123079989 is an apocalyptic number.

It is an amenable number.

1123079989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123079989 is an equidigital number, since it uses as much as digits as its factorization.

1123079989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 1123079989 is about 33512.3856059219. The cubic root of 1123079989 is about 1039.4499029319.

It can be divided in two parts, 11230 and 79989, that added together give a palindrome (91219).

The spelling of 1123079989 in words is "one billion, one hundred twenty-three million, seventy-nine thousand, nine hundred eighty-nine".