123494389 has 2 divisors, whose sum is σ = 123494390. Its totient is φ = 123494388.

The previous prime is 123494381. The next prime is 123494447. The reversal of 123494389 is 983494321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97911025 + 25583364 = 9895^2 + 5058^2 .

It is a cyclic number.

It is not a de Polignac number, because 123494389 - 2³ = 123494381 is a prime.

It is a super-2 number, since 2×123494389² = 30501728228966642, which contains 22 as substring.

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 (123494381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61747194 + 61747195.

It is an arithmetic number, because the mean of its divisors is an integer number (61747195).

Almost surely, 2^123494389 is an apocalyptic number.

It is an amenable number.

123494389 is a deficient number, since it is larger than the sum of its proper divisors (1).

123494389 is an equidigital number, since it uses as much as digits as its factorization.

123494389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 123494389 is about 11112.8029317540. The cubic root of 123494389 is about 497.9844043330.

The spelling of 123494389 in words is "one hundred twenty-three million, four hundred ninety-four thousand, three hundred eighty-nine".