123116569 has 2 divisors, whose sum is σ = 123116570. Its totient is φ = 123116568.

The previous prime is 123116519. The next prime is 123116573. The reversal of 123116569 is 965611321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110250000 + 12866569 = 10500^2 + 3587^2 .

It is an emirp because it is prime and its reverse (965611321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123116569 is a prime.

It is a super-4 number, since 4×123116569⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (123116519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61558284 + 61558285.

It is an arithmetic number, because the mean of its divisors is an integer number (61558285).

Almost surely, 2^123116569 is an apocalyptic number.

It is an amenable number.

123116569 is a deficient number, since it is larger than the sum of its proper divisors (1).

123116569 is an equidigital number, since it uses as much as digits as its factorization.

123116569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 34.

The square root of 123116569 is about 11095.7905982404. The cubic root of 123116569 is about 497.4760393501.

The spelling of 123116569 in words is "one hundred twenty-three million, one hundred sixteen thousand, five hundred sixty-nine".