870109871 has 16 divisors (see below), whose sum is σ = 910540800. Its totient is φ = 830707488.

The previous prime is 870109847. The next prime is 870109873. The reversal of 870109871 is 178901078.

It is a cyclic number.

It is not a de Polignac number, because 870109871 - 2²⁶ = 803001007 is a prime.

It is a super-2 number, since 2×870109871² = 1514182375223273282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870109873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522386 + ... + 524048.

It is an arithmetic number, because the mean of its divisors is an integer number (56908800).

Almost surely, 2^870109871 is an apocalyptic number.

870109871 is a deficient number, since it is larger than the sum of its proper divisors (40430929).

870109871 is a wasteful number, since it uses less digits than its factorization.

870109871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958.

The product of its (nonzero) digits is 28224, while the sum is 41.

The square root of 870109871 is about 29497.6248365864. The cubic root of 870109871 is about 954.6804559422.

The spelling of 870109871 in words is "eight hundred seventy million, one hundred nine thousand, eight hundred seventy-one".