5679810821 has 2 divisors, whose sum is σ = 5679810822. Its totient is φ = 5679810820.

The previous prime is 5679810779. The next prime is 5679810841. The reversal of 5679810821 is 1280189765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3243302500 + 2436508321 = 56950^2 + 49361^2 .

It is a cyclic number.

It is not a de Polignac number, because 5679810821 - 2⁶ = 5679810757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5679810841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2839905410 + 2839905411.

It is an arithmetic number, because the mean of its divisors is an integer number (2839905411).

Almost surely, 2^5679810821 is an apocalyptic number.

It is an amenable number.

5679810821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5679810821 is an equidigital number, since it uses as much as digits as its factorization.

5679810821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 5679810821 is about 75364.5196428664. The cubic root of 5679810821 is about 1784.2044721171.

The spelling of 5679810821 in words is "five billion, six hundred seventy-nine million, eight hundred ten thousand, eight hundred twenty-one".