3871000541209 has 4 divisors (see below), whose sum is σ = 3871511706916. Its totient is φ = 3870489375504.

The previous prime is 3871000541201. The next prime is 3871000541237. The reversal of 3871000541209 is 9021450001783.

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 2924168400400 + 946832140809 = 1710020^2 + 973053^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871000541209 - 2³ = 3871000541201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3871000541201) 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, 255571494 + ... + 255586639.

It is an arithmetic number, because the mean of its divisors is an integer number (967877926729).

Almost surely, 2^{3871000541209} is an apocalyptic number.

It is an amenable number.

3871000541209 is a deficient number, since it is larger than the sum of its proper divisors (511165707).

3871000541209 is an equidigital number, since it uses as much as digits as its factorization.

3871000541209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511165706.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 3871000541209 in words is "three trillion, eight hundred seventy-one billion, five hundred forty-one thousand, two hundred nine".