123298789 has 2 divisors, whose sum is σ = 123298790. Its totient is φ = 123298788.

The previous prime is 123298787. The next prime is 123298793. The reversal of 123298789 is 987892321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122213025 + 1085764 = 11055^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 123298789 - 2¹ = 123298787 is a prime.

Together with 123298787, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123298781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61649394 + 61649395.

It is an arithmetic number, because the mean of its divisors is an integer number (61649395).

Almost surely, 2^123298789 is an apocalyptic number.

It is an amenable number.

123298789 is a deficient number, since it is larger than the sum of its proper divisors (1).

123298789 is an equidigital number, since it uses as much as digits as its factorization.

123298789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 123298789 is about 11103.9987842218. The cubic root of 123298789 is about 497.7213499496.

The spelling of 123298789 in words is "one hundred twenty-three million, two hundred ninety-eight thousand, seven hundred eighty-nine".