870851887 has 4 divisors (see below), whose sum is σ = 870935416. Its totient is φ = 870768360.

The previous prime is 870851873. The next prime is 870851893. The reversal of 870851887 is 788158078.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 870851887 - 2¹¹ = 870849839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870851837) 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, 23448 + ... + 47869.

It is an arithmetic number, because the mean of its divisors is an integer number (217733854).

Almost surely, 2^870851887 is an apocalyptic number.

870851887 is a deficient number, since it is larger than the sum of its proper divisors (83529).

870851887 is a wasteful number, since it uses less digits than its factorization.

870851887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83528.

The product of its (nonzero) digits is 1003520, while the sum is 52.

The square root of 870851887 is about 29510.1997112863. The cubic root of 870851887 is about 954.9517576573.

The spelling of 870851887 in words is "eight hundred seventy million, eight hundred fifty-one thousand, eight hundred eighty-seven".