1123345217 has 2 divisors, whose sum is σ = 1123345218. Its totient is φ = 1123345216.

The previous prime is 1123345213. The next prime is 1123345241. The reversal of 1123345217 is 7125433211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677248576 + 446096641 = 26024^2 + 21121^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123345217 - 2² = 1123345213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123345217.

It is not a weakly prime, because it can be changed into another prime (1123345213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561672608 + 561672609.

It is an arithmetic number, because the mean of its divisors is an integer number (561672609).

Almost surely, 2^1123345217 is an apocalyptic number.

It is an amenable number.

1123345217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123345217 is an equidigital number, since it uses as much as digits as its factorization.

1123345217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 1123345217 is about 33516.3425361420. The cubic root of 1123345217 is about 1039.5317224288.

Adding to 1123345217 its reverse (7125433211), we get a palindrome (8248778428).

The spelling of 1123345217 in words is "one billion, one hundred twenty-three million, three hundred forty-five thousand, two hundred seventeen".