2871405809 has 4 divisors (see below), whose sum is σ = 2871573360. Its totient is φ = 2871238260.

The previous prime is 2871405773. The next prime is 2871405821. The reversal of 2871405809 is 9085041782.

2871405809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 9085041782 = 2 ⋅4542520891.

It is a cyclic number.

It is not a de Polignac number, because 2871405809 - 2¹² = 2871401713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2871405809.

It is not an unprimeable number, because it can be changed into a prime (2871405839) 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, 54707 + ... + 93464.

It is an arithmetic number, because the mean of its divisors is an integer number (717893340).

Almost surely, 2^2871405809 is an apocalyptic number.

It is an amenable number.

2871405809 is a deficient number, since it is larger than the sum of its proper divisors (167551).

2871405809 is a wasteful number, since it uses less digits than its factorization.

2871405809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167550.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 2871405809 is about 53585.4999883364. The cubic root of 2871405809 is about 1421.3406978386.

The spelling of 2871405809 in words is "two billion, eight hundred seventy-one million, four hundred five thousand, eight hundred nine".