123281089 has 2 divisors, whose sum is σ = 123281090. Its totient is φ = 123281088.

The previous prime is 123281029. The next prime is 123281099. The reversal of 123281089 is 980182321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121881600 + 1399489 = 11040^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 123281089 - 2¹¹ = 123279041 is a prime.

It is not a weakly prime, because it can be changed into another prime (123281029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61640544 + 61640545.

It is an arithmetic number, because the mean of its divisors is an integer number (61640545).

Almost surely, 2^123281089 is an apocalyptic number.

It is an amenable number.

123281089 is a deficient number, since it is larger than the sum of its proper divisors (1).

123281089 is an equidigital number, since it uses as much as digits as its factorization.

123281089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 123281089 is about 11103.2017454426. The cubic root of 123281089 is about 497.6975322259.

The spelling of 123281089 in words is "one hundred twenty-three million, two hundred eighty-one thousand, eighty-nine".