123989017 has 2 divisors, whose sum is σ = 123989018. Its totient is φ = 123989016.

The previous prime is 123988951. The next prime is 123989053. The reversal of 123989017 is 710989321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87216921 + 36772096 = 9339^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 123989017 - 2¹¹ = 123986969 is a prime.

It is not a weakly prime, because it can be changed into another prime (123989077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61994508 + 61994509.

It is an arithmetic number, because the mean of its divisors is an integer number (61994509).

Almost surely, 2^123989017 is an apocalyptic number.

It is an amenable number.

123989017 is a deficient number, since it is larger than the sum of its proper divisors (1).

123989017 is an equidigital number, since it uses as much as digits as its factorization.

123989017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 123989017 is about 11135.0355634816. The cubic root of 123989017 is about 498.6483721634.

The spelling of 123989017 in words is "one hundred twenty-three million, nine hundred eighty-nine thousand, seventeen".