122789501789 has 4 divisors (see below), whose sum is σ = 124343799360. Its totient is φ = 121235204220.

The previous prime is 122789501749. The next prime is 122789501831. The reversal of 122789501789 is 987105987221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 987105987221 = 12583 ⋅78447587.

It is a cyclic number.

It is not a de Polignac number, because 122789501789 - 2²⁴ = 122772724573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122789501719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777148667 + ... + 777148824.

It is an arithmetic number, because the mean of its divisors is an integer number (31085949840).

Almost surely, 2^122789501789 is an apocalyptic number.

It is an amenable number.

122789501789 is a deficient number, since it is larger than the sum of its proper divisors (1554297571).

122789501789 is an equidigital number, since it uses as much as digits as its factorization.

122789501789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554297570.

The product of its (nonzero) digits is 5080320, while the sum is 59.

The spelling of 122789501789 in words is "one hundred twenty-two billion, seven hundred eighty-nine million, five hundred one thousand, seven hundred eighty-nine".