6872819 has 4 divisors (see below), whose sum is σ = 7032696. Its totient is φ = 6712944.

The previous prime is 6872807. The next prime is 6872821. The reversal of 6872819 is 9182786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9182786 = 2 ⋅4591393.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6872819 is a prime.

It is a super-2 number, since 2×6872819² = 94471282013522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6872849) 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, 79874 + ... + 79959.

It is an arithmetic number, because the mean of its divisors is an integer number (1758174).

Almost surely, 2^6872819 is an apocalyptic number.

6872819 is a deficient number, since it is larger than the sum of its proper divisors (159877).

6872819 is a wasteful number, since it uses less digits than its factorization.

6872819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159876.

The product of its digits is 48384, while the sum is 41.

The square root of 6872819 is about 2621.6061870540. The cubic root of 6872819 is about 190.1275136646.

Subtracting from 6872819 its sum of digits (41), we obtain a triangular number (6872778 = T₃₇₀₇).

The spelling of 6872819 in words is "six million, eight hundred seventy-two thousand, eight hundred nineteen".