1123312997 has 2 divisors, whose sum is σ = 1123312998. Its totient is φ = 1123312996.

The previous prime is 1123312979. The next prime is 1123313027. The reversal of 1123312997 is 7992133211.

Together with previous prime (1123312979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 716847076 + 406465921 = 26774^2 + 20161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123312997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123312997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123312397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561656498 + 561656499.

It is an arithmetic number, because the mean of its divisors is an integer number (561656499).

Almost surely, 2^1123312997 is an apocalyptic number.

It is an amenable number.

1123312997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123312997 is an equidigital number, since it uses as much as digits as its factorization.

1123312997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 38.

The square root of 1123312997 is about 33515.8618716571. The cubic root of 1123312997 is about 1039.5217836519.

The spelling of 1123312997 in words is "one billion, one hundred twenty-three million, three hundred twelve thousand, nine hundred ninety-seven".