122689978597 has 4 divisors (see below), whose sum is σ = 122709327520. Its totient is φ = 122670629676.

The previous prime is 122689978591. The next prime is 122689978627. The reversal of 122689978597 is 795879986221.

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: 795879986221 = 41 ⋅19411706981.

It is a cyclic number.

It is not a de Polignac number, because 122689978597 - 2³ = 122689978589 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 (122689978591) 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, 9664947 + ... + 9677632.

It is an arithmetic number, because the mean of its divisors is an integer number (30677331880).

Almost surely, 2^122689978597 is an apocalyptic number.

It is an amenable number.

122689978597 is a deficient number, since it is larger than the sum of its proper divisors (19348923).

122689978597 is an equidigital number, since it uses as much as digits as its factorization.

122689978597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19348922.

The product of its digits is 274337280, while the sum is 73.

The spelling of 122689978597 in words is "one hundred twenty-two billion, six hundred eighty-nine million, nine hundred seventy-eight thousand, five hundred ninety-seven".