870660817 has 16 divisors (see below), whose sum is σ = 965664000. Its totient is φ = 780009984.

The previous prime is 870660811. The next prime is 870660821. The reversal of 870660817 is 718066078.

It is a de Polignac number, because none of the positive numbers 2^k-870660817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870660811) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53409 + ... + 67777.

It is an arithmetic number, because the mean of its divisors is an integer number (60354000).

Almost surely, 2^870660817 is an apocalyptic number.

It is an amenable number.

870660817 is a deficient number, since it is larger than the sum of its proper divisors (95003183).

870660817 is a wasteful number, since it uses less digits than its factorization.

870660817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14520.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 870660817 is about 29506.9621784419. The cubic root of 870660817 is about 954.8819118810.

The spelling of 870660817 in words is "eight hundred seventy million, six hundred sixty thousand, eight hundred seventeen".