868828939 has 4 divisors (see below), whose sum is σ = 947813400. Its totient is φ = 789844480.

The previous prime is 868828937. The next prime is 868828943. The reversal of 868828939 is 939828868.

868828939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 868828939 - 2¹ = 868828937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868828937) 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, 39492214 + ... + 39492235.

It is an arithmetic number, because the mean of its divisors is an integer number (236953350).

Almost surely, 2^868828939 is an apocalyptic number.

868828939 is a deficient number, since it is larger than the sum of its proper divisors (78984461).

868828939 is a wasteful number, since it uses less digits than its factorization.

868828939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78984460.

The product of its digits is 11943936, while the sum is 61.

The square root of 868828939 is about 29475.9043796793. The cubic root of 868828939 is about 954.2117483434.

The spelling of 868828939 in words is "eight hundred sixty-eight million, eight hundred twenty-eight thousand, nine hundred thirty-nine".