873711989 has 4 divisors (see below), whose sum is σ = 874866924. Its totient is φ = 872557056.

The previous prime is 873711983. The next prime is 873712027. The reversal of 873711989 is 989117378.

873711989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 455182225 + 418529764 = 21335^2 + 20458^2 .

It is a cyclic number.

It is not a de Polignac number, because 873711989 - 2⁴ = 873711973 is a prime.

It is a super-2 number, since 2×873711989² = 1526745279444672242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 873711989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873711983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576332 + ... + 577845.

It is an arithmetic number, because the mean of its divisors is an integer number (218716731).

Almost surely, 2^873711989 is an apocalyptic number.

It is an amenable number.

873711989 is a deficient number, since it is larger than the sum of its proper divisors (1154935).

873711989 is a wasteful number, since it uses less digits than its factorization.

873711989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154934.

The product of its digits is 762048, while the sum is 53.

The square root of 873711989 is about 29558.6195381313. The cubic root of 873711989 is about 955.9960511295.

The spelling of 873711989 in words is "eight hundred seventy-three million, seven hundred eleven thousand, nine hundred eighty-nine".