8219315837 has 2 divisors, whose sum is σ = 8219315838. Its totient is φ = 8219315836.

The previous prime is 8219315833. The next prime is 8219315869. The reversal of 8219315837 is 7385139128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5268001561 + 2951314276 = 72581^2 + 54326^2 .

It is a cyclic number.

It is not a de Polignac number, because 8219315837 - 2² = 8219315833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8219315791 and 8219315800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8219315833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109657918 + 4109657919.

It is an arithmetic number, because the mean of its divisors is an integer number (4109657919).

Almost surely, 2^8219315837 is an apocalyptic number.

It is an amenable number.

8219315837 is a deficient number, since it is larger than the sum of its proper divisors (1).

8219315837 is an equidigital number, since it uses as much as digits as its factorization.

8219315837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 8219315837 is about 90660.4425149139. The cubic root of 8219315837 is about 2018.1118058812. Note that the first 3 decimals are identical.

The spelling of 8219315837 in words is "eight billion, two hundred nineteen million, three hundred fifteen thousand, eight hundred thirty-seven".