123213089 has 2 divisors, whose sum is σ = 123213090. Its totient is φ = 123213088.

The previous prime is 123213073. The next prime is 123213091. The reversal of 123213089 is 980312321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123032464 + 180625 = 11092^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 123213089 - 2⁴ = 123213073 is a prime.

Together with 123213091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123213019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61606544 + 61606545.

It is an arithmetic number, because the mean of its divisors is an integer number (61606545).

Almost surely, 2^123213089 is an apocalyptic number.

It is an amenable number.

123213089 is a deficient number, since it is larger than the sum of its proper divisors (1).

123213089 is an equidigital number, since it uses as much as digits as its factorization.

123213089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 123213089 is about 11100.1391432720. The cubic root of 123213089 is about 497.6060078976.

The spelling of 123213089 in words is "one hundred twenty-three million, two hundred thirteen thousand, eighty-nine".