1123312999 has 16 divisors (see below), whose sum is σ = 1176753600. Its totient is φ = 1070931456.

The previous prime is 1123312997. The next prime is 1123313027. The reversal of 1123312999 is 9992133211.

It is a cyclic number.

It is not a de Polignac number, because 1123312999 - 2¹ = 1123312997 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 (1123312997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221862 + ... + 1222780.

It is an arithmetic number, because the mean of its divisors is an integer number (73547100).

Almost surely, 2^1123312999 is an apocalyptic number.

1123312999 is a deficient number, since it is larger than the sum of its proper divisors (53440601).

1123312999 is a wasteful number, since it uses less digits than its factorization.

1123312999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434.

The product of its digits is 26244, while the sum is 40.

The square root of 1123312999 is about 33515.8619014937. The cubic root of 1123312999 is about 1039.5217842689.

The spelling of 1123312999 in words is "one billion, one hundred twenty-three million, three hundred twelve thousand, nine hundred ninety-nine".