870668815 has 4 divisors (see below), whose sum is σ = 1044802584. Its totient is φ = 696535048.

The previous prime is 870668809. The next prime is 870668831. The reversal of 870668815 is 518866078.

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

It is a cyclic number.

It is not a de Polignac number, because 870668815 - 2³ = 870668807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87066877 + ... + 87066886.

It is an arithmetic number, because the mean of its divisors is an integer number (261200646).

Almost surely, 2^870668815 is an apocalyptic number.

870668815 is a deficient number, since it is larger than the sum of its proper divisors (174133769).

870668815 is a wasteful number, since it uses less digits than its factorization.

870668815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174133768.

The product of its (nonzero) digits is 645120, while the sum is 49.

The square root of 870668815 is about 29507.0977054674. The cubic root of 870668815 is about 954.8848357606.

The spelling of 870668815 in words is "eight hundred seventy million, six hundred sixty-eight thousand, eight hundred fifteen".