123207289 has 2 divisors, whose sum is σ = 123207290. Its totient is φ = 123207288.

The previous prime is 123207263. The next prime is 123207317. The reversal of 123207289 is 982702321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62678889 + 60528400 = 7917^2 + 7780^2 .

It is a cyclic number.

It is not a de Polignac number, because 123207289 - 2¹⁵ = 123174521 is a prime.

It is not a weakly prime, because it can be changed into another prime (123207589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61603644 + 61603645.

It is an arithmetic number, because the mean of its divisors is an integer number (61603645).

Almost surely, 2^123207289 is an apocalyptic number.

It is an amenable number.

123207289 is a deficient number, since it is larger than the sum of its proper divisors (1).

123207289 is an equidigital number, since it uses as much as digits as its factorization.

123207289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 123207289 is about 11099.8778822111. The cubic root of 123207289 is about 497.5981998523.

The spelling of 123207289 in words is "one hundred twenty-three million, two hundred seven thousand, two hundred eighty-nine".