870001887 has 32 divisors (see below), whose sum is σ = 1315307520. Its totient is φ = 508606560.

The previous prime is 870001883. The next prime is 870001907. The reversal of 870001887 is 788100078.

It is a happy number.

It is not a de Polignac number, because 870001887 - 2² = 870001883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870001883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29938 + ... + 51344.

It is an arithmetic number, because the mean of its divisors is an integer number (41103360).

Almost surely, 2^870001887 is an apocalyptic number.

870001887 is a deficient number, since it is larger than the sum of its proper divisors (445305633).

870001887 is a wasteful number, since it uses less digits than its factorization.

870001887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21483.

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 870001887 is about 29495.7943951337. The cubic root of 870001887 is about 954.6409611294.

The spelling of 870001887 in words is "eight hundred seventy million, one thousand, eight hundred eighty-seven".