869989867 has 4 divisors (see below), whose sum is σ = 876340296. Its totient is φ = 863639440.

The previous prime is 869989849. The next prime is 869989871. The reversal of 869989867 is 768989968.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869989867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 869989796 and 869989805.

It is not an unprimeable number, because it can be changed into a prime (869989817) 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, 3175009 + ... + 3175282.

It is an arithmetic number, because the mean of its divisors is an integer number (219085074).

Almost surely, 2^869989867 is an apocalyptic number.

869989867 is a deficient number, since it is larger than the sum of its proper divisors (6350429).

869989867 is a wasteful number, since it uses less digits than its factorization.

869989867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6350428.

The product of its digits is 94058496, while the sum is 70.

The square root of 869989867 is about 29495.5906365680. The cubic root of 869989867 is about 954.6365646496.

The spelling of 869989867 in words is "eight hundred sixty-nine million, nine hundred eighty-nine thousand, eight hundred sixty-seven".