789901109987 has 6 divisors (see below), whose sum is σ = 868238410284. Its totient is φ = 718091918060.

The previous prime is 789901109909. The next prime is 789901109993.

789901109987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 789901109987 - 2²⁰ = 789900061411 is a prime.

It is a super-2 number, since 2×789901109987² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (789901109687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3264054053 + ... + 3264054294.

It is an arithmetic number, because the mean of its divisors is an integer number (144706401714).

Almost surely, 2^789901109987 is an apocalyptic number.

789901109987 is a deficient number, since it is larger than the sum of its proper divisors (78337300297).

789901109987 is a wasteful number, since it uses less digits than its factorization.

789901109987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6528108369 (or 6528108358 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 68.

It can be divided in two parts, 78990110 and 9987, that added together give a palindrome (79000097).

The spelling of 789901109987 in words is "seven hundred eighty-nine billion, nine hundred one million, one hundred nine thousand, nine hundred eighty-seven".