2173901879 has 4 divisors (see below), whose sum is σ = 2268419376. Its totient is φ = 2079384384.

The previous prime is 2173901869. The next prime is 2173901941. The reversal of 2173901879 is 9781093712.

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 2173901879 - 2¹² = 2173897783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173901819) 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, 47258714 + ... + 47258759.

It is an arithmetic number, because the mean of its divisors is an integer number (567104844).

Almost surely, 2^2173901879 is an apocalyptic number.

2173901879 is a deficient number, since it is larger than the sum of its proper divisors (94517497).

2173901879 is an equidigital number, since it uses as much as digits as its factorization.

2173901879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94517496.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 2173901879 is about 46625.1206861709. The cubic root of 2173901879 is about 1295.4280977577.

The spelling of 2173901879 in words is "two billion, one hundred seventy-three million, nine hundred one thousand, eight hundred seventy-nine".