122991286589 has 16 divisors (see below), whose sum is σ = 130933936512. Its totient is φ = 115270803648.

The previous prime is 122991286549. The next prime is 122991286601. The reversal of 122991286589 is 985682199221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122991286589 - 2¹² = 122991282493 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 (122991286549) 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 15 ways as a sum of consecutive naturals, for example, 856142 + ... + 989424.

It is an arithmetic number, because the mean of its divisors is an integer number (8183371032).

Almost surely, 2^122991286589 is an apocalyptic number.

It is an amenable number.

122991286589 is a deficient number, since it is larger than the sum of its proper divisors (7942649923).

122991286589 is a wasteful number, since it uses less digits than its factorization.

122991286589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134116.

The product of its digits is 11197440, while the sum is 62.

The spelling of 122991286589 in words is "one hundred twenty-two billion, nine hundred ninety-one million, two hundred eighty-six thousand, five hundred eighty-nine".