3872209208873 has 4 divisors (see below), whose sum is σ = 3891865093380. Its totient is φ = 3852553324368.

The previous prime is 3872209208837. The next prime is 3872209208887. The reversal of 3872209208873 is 3788029022783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2798969152144 + 1073240056729 = 1673012^2 + 1035973^2 .

It is a cyclic number.

It is not a de Polignac number, because 3872209208873 - 2⁶ = 3872209208809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3872209238873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9827941958 + ... + 9827942351.

It is an arithmetic number, because the mean of its divisors is an integer number (972966273345).

Almost surely, 2^{3872209208873} is an apocalyptic number.

It is an amenable number.

3872209208873 is a deficient number, since it is larger than the sum of its proper divisors (19655884507).

3872209208873 is a wasteful number, since it uses less digits than its factorization.

3872209208873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19655884506.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 3872209208873 in words is "three trillion, eight hundred seventy-two billion, two hundred nine million, two hundred eight thousand, eight hundred seventy-three".