8213945713819 has 2 divisors, whose sum is σ = 8213945713820. Its totient is φ = 8213945713818.

The previous prime is 8213945713781. The next prime is 8213945713847. The reversal of 8213945713819 is 9183175493128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8213945713819 - 2⁷ = 8213945713691 is a prime.

It is a super-2 number, since 2×8213945713819² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8213945713019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4106972856909 + 4106972856910.

It is an arithmetic number, because the mean of its divisors is an integer number (4106972856910).

Almost surely, 2^{8213945713819} is an apocalyptic number.

8213945713819 is a deficient number, since it is larger than the sum of its proper divisors (1).

8213945713819 is an equidigital number, since it uses as much as digits as its factorization.

8213945713819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 61.

The spelling of 8213945713819 in words is "eight trillion, two hundred thirteen billion, nine hundred forty-five million, seven hundred thirteen thousand, eight hundred nineteen".