867939881 has 8 divisors (see below), whose sum is σ = 879229344. Its totient is φ = 856670400.

The previous prime is 867939841. The next prime is 867939887. The reversal of 867939881 is 188939768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-867939881 is a prime.

It is a super-2 number, since 2×867939881² = 1506639274060588322, which contains 22 as substring.

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 867939881.

It is not an unprimeable number, because it can be changed into a prime (867939887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95330 + ... + 104036.

It is an arithmetic number, because the mean of its divisors is an integer number (109903668).

Almost surely, 2^867939881 is an apocalyptic number.

It is an amenable number.

867939881 is a deficient number, since it is larger than the sum of its proper divisors (11289463).

867939881 is a wasteful number, since it uses less digits than its factorization.

867939881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9991.

The product of its digits is 5225472, while the sum is 59.

The square root of 867939881 is about 29460.8194217337. The cubic root of 867939881 is about 953.8861609992.

The spelling of 867939881 in words is "eight hundred sixty-seven million, nine hundred thirty-nine thousand, eight hundred eighty-one".