868772899 has 4 divisors (see below), whose sum is σ = 868992664. Its totient is φ = 868553136.

The previous prime is 868772893. The next prime is 868772909. The reversal of 868772899 is 998277868.

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 868772899 - 2⁵ = 868772867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 868772899.

It is not an unprimeable number, because it can be changed into a prime (868772893) 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, 103842 + ... + 111895.

It is an arithmetic number, because the mean of its divisors is an integer number (217248166).

Almost surely, 2^868772899 is an apocalyptic number.

868772899 is a deficient number, since it is larger than the sum of its proper divisors (219765).

868772899 is a wasteful number, since it uses less digits than its factorization.

868772899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219764.

The product of its digits is 24385536, while the sum is 64.

The square root of 868772899 is about 29474.9537573853. The cubic root of 868772899 is about 954.1912321544.

The spelling of 868772899 in words is "eight hundred sixty-eight million, seven hundred seventy-two thousand, eight hundred ninety-nine".