789987 has 16 divisors (see below), whose sum is σ = 1181952. Its totient is φ = 465120.

The previous prime is 789979. The next prime is 790003.

789987 is nontrivially palindromic in base 10.

789987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 789987 - 2³ = 789979 is a prime.

789987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (789967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 898 + ... + 1544.

It is an arithmetic number, because the mean of its divisors is an integer number (73872).

2⁷⁸⁹⁹⁸⁷ is an apocalyptic number.

789987 is a deficient number, since it is larger than the sum of its proper divisors (391965).

789987 is a wasteful number, since it uses less digits than its factorization.

789987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698.

The product of its digits is 254016, while the sum is 48.

The square root of 789987 is about 888.8121286301. The cubic root of 789987 is about 92.4428475777.

The spelling of 789987 in words is "seven hundred eighty-nine thousand, nine hundred eighty-seven".