2173048777 has 4 divisors (see below), whose sum is σ = 2173148176. Its totient is φ = 2172949380.

The previous prime is 2173048751. The next prime is 2173048789. The reversal of 2173048777 is 7778403712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2173048777 - 2¹⁵ = 2173016009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2173048727) 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 3 ways as a sum of consecutive naturals, for example, 999 + ... + 65932.

It is an arithmetic number, because the mean of its divisors is an integer number (543287044).

Almost surely, 2^2173048777 is an apocalyptic number.

It is an amenable number.

2173048777 is a deficient number, since it is larger than the sum of its proper divisors (99399).

2173048777 is an equidigital number, since it uses as much as digits as its factorization.

2173048777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99398.

The product of its (nonzero) digits is 460992, while the sum is 46.

The square root of 2173048777 is about 46615.9712652220. The cubic root of 2173048777 is about 1295.2586210969.

It can be divided in two parts, 21730 and 48777, that added together give a palindrome (70507).

The spelling of 2173048777 in words is "two billion, one hundred seventy-three million, forty-eight thousand, seven hundred seventy-seven".