2851673909 has 4 divisors (see below), whose sum is σ = 3259055904. Its totient is φ = 2444291916.

The previous prime is 2851673833. The next prime is 2851673921. The reversal of 2851673909 is 9093761582.

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.

It is a cyclic number.

It is not a de Polignac number, because 2851673909 - 2²⁸ = 2583238453 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 (2851673939) 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, 203690987 + ... + 203691000.

It is an arithmetic number, because the mean of its divisors is an integer number (814763976).

Almost surely, 2^2851673909 is an apocalyptic number.

It is an amenable number.

2851673909 is a deficient number, since it is larger than the sum of its proper divisors (407381995).

2851673909 is an equidigital number, since it uses as much as digits as its factorization.

2851673909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407381994.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 2851673909 is about 53401.0665530193. The cubic root of 2851673909 is about 1418.0774599059.

It can be divided in two parts, 2851673 and 909, that added together give a palindrome (2852582).

The spelling of 2851673909 in words is "two billion, eight hundred fifty-one million, six hundred seventy-three thousand, nine hundred nine".