2143378867 has 4 divisors (see below), whose sum is σ = 2449575856. Its totient is φ = 1837181880.

The previous prime is 2143378859. The next prime is 2143378871. The reversal of 2143378867 is 7688733412.

It is a happy number.

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 2143378867 - 2³ = 2143378859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2143378867.

It is not an unprimeable number, because it can be changed into a prime (2143373867) 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, 153098484 + ... + 153098497.

It is an arithmetic number, because the mean of its divisors is an integer number (612393964).

Almost surely, 2^2143378867 is an apocalyptic number.

2143378867 is a deficient number, since it is larger than the sum of its proper divisors (306196989).

2143378867 is an equidigital number, since it uses as much as digits as its factorization.

2143378867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306196988.

The product of its digits is 1354752, while the sum is 49.

The square root of 2143378867 is about 46296.6399104730. The cubic root of 2143378867 is about 1289.3366112141.

The spelling of 2143378867 in words is "two billion, one hundred forty-three million, three hundred seventy-eight thousand, eight hundred sixty-seven".