867867867 has 18 divisors (see below), whose sum is σ = 1331668988. Its totient is φ = 544542912.

The previous prime is 867867863. The next prime is 867867887. The reversal of 867867867 is 768768768.

It is not a de Polignac number, because 867867867 - 2² = 867867863 is a prime.

It is a super-2 number, since 2×867867867² = 1506389269142259378, which contains 22 as substring.

It is a Duffinian number.

867867867 is a modest number, since divided by 867867 gives 867 as remainder.

It is not an unprimeable number, because it can be changed into a prime (867867863) 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 17 ways as a sum of consecutive naturals, for example, 164233 + ... + 169434.

Almost surely, 2^867867867 is an apocalyptic number.

867867867 is a deficient number, since it is larger than the sum of its proper divisors (463801121).

867867867 is a wasteful number, since it uses less digits than its factorization.

867867867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333707 (or 333687 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 63.

The square root of 867867867 is about 29459.5971968389. The cubic root of 867867867 is about 953.8597785813.

Subtracting from 867867867 its reverse (768768768), we obtain a palindrome (99099099).

The spelling of 867867867 in words is "eight hundred sixty-seven million, eight hundred sixty-seven thousand, eight hundred sixty-seven".