867659887 has 4 divisors (see below), whose sum is σ = 870861856. Its totient is φ = 864457920.

The previous prime is 867659869. The next prime is 867659927. The reversal of 867659887 is 788956768.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 867659887 - 2⁷ = 867659759 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 (867659867) 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 3 ways as a sum of consecutive naturals, for example, 1600578 + ... + 1601119.

It is an arithmetic number, because the mean of its divisors is an integer number (217715464).

Almost surely, 2^867659887 is an apocalyptic number.

867659887 is a deficient number, since it is larger than the sum of its proper divisors (3201969).

867659887 is a wasteful number, since it uses less digits than its factorization.

867659887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3201968.

The product of its digits is 40642560, while the sum is 64.

The square root of 867659887 is about 29456.0670660562. The cubic root of 867659887 is about 953.7835766564.

The spelling of 867659887 in words is "eight hundred sixty-seven million, six hundred fifty-nine thousand, eight hundred eighty-seven".