870055617 has 4 divisors (see below), whose sum is σ = 1160074160. Its totient is φ = 580037076.

The previous prime is 870055609. The next prime is 870055621. The reversal of 870055617 is 716550078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 870055617 - 2³ = 870055609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870055217) 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, 145009267 + ... + 145009272.

It is an arithmetic number, because the mean of its divisors is an integer number (290018540).

Almost surely, 2^870055617 is an apocalyptic number.

It is an amenable number.

870055617 is a deficient number, since it is larger than the sum of its proper divisors (290018543).

870055617 is a wasteful number, since it uses less digits than its factorization.

870055617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290018542.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 870055617 is about 29496.7051888851. The cubic root of 870055617 is about 954.6606131186.

The spelling of 870055617 in words is "eight hundred seventy million, fifty-five thousand, six hundred seventeen".