1123409993 has 2 divisors, whose sum is σ = 1123409994. Its totient is φ = 1123409992.

The previous prime is 1123409983. The next prime is 1123410049. The reversal of 1123409993 is 3999043211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 853399369 + 270010624 = 29213^2 + 16432^2 .

It is an emirp because it is prime and its reverse (3999043211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123409993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123409993.

It is not a weakly prime, because it can be changed into another prime (1123409983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561704996 + 561704997.

It is an arithmetic number, because the mean of its divisors is an integer number (561704997).

Almost surely, 2^1123409993 is an apocalyptic number.

It is an amenable number.

1123409993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123409993 is an equidigital number, since it uses as much as digits as its factorization.

1123409993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 1123409993 is about 33517.3088567683. The cubic root of 1123409993 is about 1039.5517030520.

The spelling of 1123409993 in words is "one billion, one hundred twenty-three million, four hundred nine thousand, nine hundred ninety-three".