870846909 has 8 divisors (see below), whose sum is σ = 1164115680. Its totient is φ = 579071376.

The previous prime is 870846901. The next prime is 870846923. The reversal of 870846909 is 909648078.

It is a happy number.

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

It is not a de Polignac number, because 870846909 - 2³ = 870846901 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870846901) 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, 371947 + ... + 374280.

It is an arithmetic number, because the mean of its divisors is an integer number (145514460).

Almost surely, 2^870846909 is an apocalyptic number.

It is an amenable number.

870846909 is a deficient number, since it is larger than the sum of its proper divisors (293268771).

870846909 is a wasteful number, since it uses less digits than its factorization.

870846909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746619.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 870846909 is about 29510.1153674465. The cubic root of 870846909 is about 954.9499380755.

The spelling of 870846909 in words is "eight hundred seventy million, eight hundred forty-six thousand, nine hundred nine".