870730861 has 32 divisors (see below), whose sum is σ = 1186633728. Its totient is φ = 616904640.

The previous prime is 870730853. The next prime is 870730867. The reversal of 870730861 is 168037078.

It is not a de Polignac number, because 870730861 - 2³ = 870730853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870730867) 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 31 ways as a sum of consecutive naturals, for example, 60576 + ... + 73558.

It is an arithmetic number, because the mean of its divisors is an integer number (37082304).

Almost surely, 2^870730861 is an apocalyptic number.

It is an amenable number.

870730861 is a deficient number, since it is larger than the sum of its proper divisors (315902867).

870730861 is a wasteful number, since it uses less digits than its factorization.

870730861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13081.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 870730861 is about 29508.1490608950. The cubic root of 870730861 is about 954.9075177020.

The spelling of 870730861 in words is "eight hundred seventy million, seven hundred thirty thousand, eight hundred sixty-one".