8216904973 has 2 divisors, whose sum is σ = 8216904974. Its totient is φ = 8216904972.

The previous prime is 8216904947. The next prime is 8216904989. The reversal of 8216904973 is 3794096128.

8216904973 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8027622409 + 189282564 = 89597^2 + 13758^2 .

It is a cyclic number.

It is not a de Polignac number, because 8216904973 - 2²⁵ = 8183350541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8216907973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4108452486 + 4108452487.

It is an arithmetic number, because the mean of its divisors is an integer number (4108452487).

Almost surely, 2^8216904973 is an apocalyptic number.

It is an amenable number.

8216904973 is a deficient number, since it is larger than the sum of its proper divisors (1).

8216904973 is an equidigital number, since it uses as much as digits as its factorization.

8216904973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 8216904973 is about 90647.1454211328. The cubic root of 8216904973 is about 2017.9144711729.

The spelling of 8216904973 in words is "eight billion, two hundred sixteen million, nine hundred four thousand, nine hundred seventy-three".