868669881 has 4 divisors (see below), whose sum is σ = 1158226512. Its totient is φ = 579113252.

The previous prime is 868669847. The next prime is 868669883. The reversal of 868669881 is 188966868.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 868669881 - 2¹⁴ = 868653497 is a prime.

It is a super-2 number, since 2×868669881² = 1509174724313108322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (868669883) 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, 144778311 + ... + 144778316.

It is an arithmetic number, because the mean of its divisors is an integer number (289556628).

Almost surely, 2^868669881 is an apocalyptic number.

It is an amenable number.

868669881 is a deficient number, since it is larger than the sum of its proper divisors (289556631).

868669881 is a wasteful number, since it uses less digits than its factorization.

868669881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289556630.

The product of its digits is 7962624, while the sum is 60.

The square root of 868669881 is about 29473.2061540647. The cubic root of 868669881 is about 954.1535150640.

The spelling of 868669881 in words is "eight hundred sixty-eight million, six hundred sixty-nine thousand, eight hundred eighty-one".