867492891 has 12 divisors (see below), whose sum is σ = 1260047880. Its totient is φ = 575096640.

The previous prime is 867492887. The next prime is 867492893. The reversal of 867492891 is 198294768.

867492891 is a `hidden beast` number, since 8 + 67 + 492 + 8 + 91 = 666.

It is not a de Polignac number, because 867492891 - 2² = 867492887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (867492893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267630 + ... + 270851.

It is an arithmetic number, because the mean of its divisors is an integer number (105003990).

Almost surely, 2^867492891 is an apocalyptic number.

867492891 is a deficient number, since it is larger than the sum of its proper divisors (392554989).

867492891 is a wasteful number, since it uses less digits than its factorization.

867492891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538666 (or 538663 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 867492891 is about 29453.2322674439. The cubic root of 867492891 is about 953.7223820708.

The spelling of 867492891 in words is "eight hundred sixty-seven million, four hundred ninety-two thousand, eight hundred ninety-one".