2870420809 has 4 divisors (see below), whose sum is σ = 2909741716. Its totient is φ = 2831099904.

The previous prime is 2870420807. The next prime is 2870420821. The reversal of 2870420809 is 9080240782.

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 1077152400 + 1793268409 = 32820^2 + 42347^2 .

It is a cyclic number.

It is not a de Polignac number, because 2870420809 - 2¹ = 2870420807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2870420807) 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, 19660344 + ... + 19660489.

It is an arithmetic number, because the mean of its divisors is an integer number (727435429).

Almost surely, 2^2870420809 is an apocalyptic number.

It is an amenable number.

2870420809 is a deficient number, since it is larger than the sum of its proper divisors (39320907).

2870420809 is an equidigital number, since it uses as much as digits as its factorization.

2870420809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39320906.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 2870420809 is about 53576.3082808064. The cubic root of 2870420809 is about 1421.1781548431.

The spelling of 2870420809 in words is "two billion, eight hundred seventy million, four hundred twenty thousand, eight hundred nine".