789981 has 12 divisors (see below), whose sum is σ = 1109472. Its totient is φ = 499048.

The previous prime is 789979. The next prime is 790003. The reversal of 789981 is 189987.

It is not a de Polignac number, because 789981 - 2¹ = 789979 is a prime.

It is a super-2 number, since 2×789981² = 1248139960722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (789941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7330 + ... + 7436.

It is an arithmetic number, because the mean of its divisors is an integer number (92456).

2⁷⁸⁹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

789981 is a deficient number, since it is larger than the sum of its proper divisors (319491).

789981 is a wasteful number, since it uses less digits than its factorization.

789981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 133 counting only the distinct ones).

The product of its digits is 36288, while the sum is 42.

The square root of 789981 is about 888.8087533322. The cubic root of 789981 is about 92.4426135408.

It can be divided in two parts, 789 and 981, that added together give a triangular number (1770 = T₅₉).

The spelling of 789981 in words is "seven hundred eighty-nine thousand, nine hundred eighty-one".