2173858867 has 6 divisors (see below), whose sum is σ = 2309255228. Its totient is φ = 2045984544.

The previous prime is 2173858847. The next prime is 2173858889. The reversal of 2173858867 is 7688583712.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2173858867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2173858847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3760713 + ... + 3761290.

Almost surely, 2^2173858867 is an apocalyptic number.

2173858867 is a deficient number, since it is larger than the sum of its proper divisors (135396361).

2173858867 is an equidigital number, since it uses as much as digits as its factorization.

2173858867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7522037 (or 7522020 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 55.

The square root of 2173858867 is about 46624.6594303916. The cubic root of 2173858867 is about 1295.4195540847.

The spelling of 2173858867 in words is "two billion, one hundred seventy-three million, eight hundred fifty-eight thousand, eight hundred sixty-seven".