123989365009 has 4 divisors (see below), whose sum is σ = 124011547200. Its totient is φ = 123967182820.

The previous prime is 123989364977. The next prime is 123989365039. The reversal of 123989365009 is 900563989321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123989365009 - 2⁵ = 123989364977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123989365039) 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 in 3 ways as a sum of consecutive naturals, for example, 11082709 + ... + 11093890.

It is an arithmetic number, because the mean of its divisors is an integer number (31002886800).

Almost surely, 2^123989365009 is an apocalyptic number.

It is an amenable number.

123989365009 is a deficient number, since it is larger than the sum of its proper divisors (22182191).

123989365009 is an equidigital number, since it uses as much as digits as its factorization.

123989365009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22182190.

The product of its (nonzero) digits is 3149280, while the sum is 55.

The spelling of 123989365009 in words is "one hundred twenty-three billion, nine hundred eighty-nine million, three hundred sixty-five thousand, nine".