8121790172183 has 2 divisors, whose sum is σ = 8121790172184. Its totient is φ = 8121790172182.

The previous prime is 8121790172147. The next prime is 8121790172231. The reversal of 8121790172183 is 3812710971218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8121790172183 - 2⁸ = 8121790171927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8121790172123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060895086091 + 4060895086092.

It is an arithmetic number, because the mean of its divisors is an integer number (4060895086092).

Almost surely, 2^{8121790172183} is an apocalyptic number.

8121790172183 is a deficient number, since it is larger than the sum of its proper divisors (1).

8121790172183 is an equidigital number, since it uses as much as digits as its factorization.

8121790172183 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 50.

The spelling of 8121790172183 in words is "eight trillion, one hundred twenty-one billion, seven hundred ninety million, one hundred seventy-two thousand, one hundred eighty-three".