8213072136173 has 2 divisors, whose sum is σ = 8213072136174. Its totient is φ = 8213072136172.

The previous prime is 8213072136167. The next prime is 8213072136221. The reversal of 8213072136173 is 3716312703128.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7582742527684 + 630329608489 = 2753678^2 + 793933^2 .

It is a cyclic number.

It is not a de Polignac number, because 8213072136173 - 2⁶ = 8213072136109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8213072136473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4106536068086 + 4106536068087.

It is an arithmetic number, because the mean of its divisors is an integer number (4106536068087).

Almost surely, 2^{8213072136173} is an apocalyptic number.

It is an amenable number.

8213072136173 is a deficient number, since it is larger than the sum of its proper divisors (1).

8213072136173 is an equidigital number, since it uses as much as digits as its factorization.

8213072136173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 8213072136173 in words is "eight trillion, two hundred thirteen billion, seventy-two million, one hundred thirty-six thousand, one hundred seventy-three".