870789 has 8 divisors (see below), whose sum is σ = 1222240. Its totient is φ = 549936.

The previous prime is 870787. The next prime is 870809. The reversal of 870789 is 987078.

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

It is not a de Polignac number, because 870789 - 2¹ = 870787 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870789.

It is not an unprimeable number, because it can be changed into a prime (870787) 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, 7582 + ... + 7695.

It is an arithmetic number, because the mean of its divisors is an integer number (152780).

2⁸⁷⁰⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

870789 is a deficient number, since it is larger than the sum of its proper divisors (351451).

870789 is a wasteful number, since it uses less digits than its factorization.

870789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15299.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 870789 is about 933.1607578547. The cubic root of 870789 is about 95.4928770397.

The spelling of 870789 in words is "eight hundred seventy thousand, seven hundred eighty-nine".