123000989 has 2 divisors, whose sum is σ = 123000990. Its totient is φ = 123000988.

The previous prime is 123000979. The next prime is 123001031. The reversal of 123000989 is 989000321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122832889 + 168100 = 11083^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 123000989 - 2⁸ = 123000733 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123000959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61500494 + 61500495.

It is an arithmetic number, because the mean of its divisors is an integer number (61500495).

Almost surely, 2^123000989 is an apocalyptic number.

It is an amenable number.

123000989 is a deficient number, since it is larger than the sum of its proper divisors (1).

123000989 is an equidigital number, since it uses as much as digits as its factorization.

123000989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 123000989 is about 11090.5810938832. The cubic root of 123000989 is about 497.3203162460.

The spelling of 123000989 in words is "one hundred twenty-three million, nine hundred eighty-nine", and thus it is an aban number.