123288817 has 2 divisors, whose sum is σ = 123288818. Its totient is φ = 123288816.

The previous prime is 123288769. The next prime is 123288859. The reversal of 123288817 is 718882321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119224561 + 4064256 = 10919^2 + 2016^2 .

It is an emirp because it is prime and its reverse (718882321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123288817 - 2⁷ = 123288689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123288817.

It is not a weakly prime, because it can be changed into another prime (123288317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61644408 + 61644409.

It is an arithmetic number, because the mean of its divisors is an integer number (61644409).

Almost surely, 2^123288817 is an apocalyptic number.

It is an amenable number.

123288817 is a deficient number, since it is larger than the sum of its proper divisors (1).

123288817 is an equidigital number, since it uses as much as digits as its factorization.

123288817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 40.

The square root of 123288817 is about 11103.5497477158. The cubic root of 123288817 is about 497.7079315667.

The spelling of 123288817 in words is "one hundred twenty-three million, two hundred eighty-eight thousand, eight hundred seventeen".