789689986987 has 8 divisors (see below), whose sum is σ = 861724142640. Its totient is φ = 717696524160.

The previous prime is 789689986979. The next prime is 789689987033.

789689986987 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 789689986987 - 2³ = 789689986979 is a prime.

It is a super-2 number, since 2×789689986987² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 789689986895 and 789689986904.

It is not an unprimeable number, because it can be changed into a prime (789689986927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10132618 + ... + 10210255.

It is an arithmetic number, because the mean of its divisors is an integer number (107715517830).

Almost surely, 2^789689986987 is an apocalyptic number.

789689986987 is a deficient number, since it is larger than the sum of its proper divisors (72034155653).

789689986987 is a wasteful number, since it uses less digits than its factorization.

789689986987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20346413.

The product of its digits is 47405481984, while the sum is 94.

The spelling of 789689986987 in words is "seven hundred eighty-nine billion, six hundred eighty-nine million, nine hundred eighty-six thousand, nine hundred eighty-seven".