6874947809 has 4 divisors (see below), whose sum is σ = 6878045460. Its totient is φ = 6871850160.

The previous prime is 6874947803. The next prime is 6874947811. The reversal of 6874947809 is 9087494786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9087494786 = 2 ⋅4543747393.

It can be written as a sum of positive squares in 2 ways, for example, as 3956787409 + 2918160400 = 62903^2 + 54020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6874947809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6874947803) 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, 1545494 + ... + 1549935.

It is an arithmetic number, because the mean of its divisors is an integer number (1719511365).

Almost surely, 2^6874947809 is an apocalyptic number.

It is an amenable number.

6874947809 is a deficient number, since it is larger than the sum of its proper divisors (3097651).

6874947809 is a wasteful number, since it uses less digits than its factorization.

6874947809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097650.

The product of its (nonzero) digits is 24385536, while the sum is 62.

The square root of 6874947809 is about 82915.3050347160. The cubic root of 6874947809 is about 1901.4714187348.

The spelling of 6874947809 in words is "six billion, eight hundred seventy-four million, nine hundred forty-seven thousand, eight hundred nine".