6919082813 has 4 divisors (see below), whose sum is σ = 6919414140. Its totient is φ = 6918751488.

The previous prime is 6919082777. The next prime is 6919082873. The reversal of 6919082813 is 3182809196.

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 6615870244 + 303212569 = 81338^2 + 17413^2 .

It is a cyclic number.

It is not a de Polignac number, because 6919082813 - 2¹² = 6919078717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6919082873) 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, 132068 + ... + 176861.

It is an arithmetic number, because the mean of its divisors is an integer number (1729853535).

Almost surely, 2^6919082813 is an apocalyptic number.

It is an amenable number.

6919082813 is a deficient number, since it is larger than the sum of its proper divisors (331327).

6919082813 is a wasteful number, since it uses less digits than its factorization.

6919082813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331326.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 6919082813 is about 83181.0243565202. The cubic root of 6919082813 is about 1905.5316921431.

The spelling of 6919082813 in words is "six billion, nine hundred nineteen million, eighty-two thousand, eight hundred thirteen".