8921292817 has 2 divisors, whose sum is σ = 8921292818. Its totient is φ = 8921292816.

The previous prime is 8921292791. The next prime is 8921292833. The reversal of 8921292817 is 7182921298.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5182704081 + 3738588736 = 71991^2 + 61144^2 .

It is a cyclic number.

It is not a de Polignac number, because 8921292817 - 2¹⁹ = 8920768529 is a prime.

It is not a weakly prime, because it can be changed into another prime (8921292617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4460646408 + 4460646409.

It is an arithmetic number, because the mean of its divisors is an integer number (4460646409).

Almost surely, 2^8921292817 is an apocalyptic number.

It is an amenable number.

8921292817 is a deficient number, since it is larger than the sum of its proper divisors (1).

8921292817 is an equidigital number, since it uses as much as digits as its factorization.

8921292817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 49.

The square root of 8921292817 is about 94452.5956075321. The cubic root of 8921292817 is about 2074.0024482265.

The spelling of 8921292817 in words is "eight billion, nine hundred twenty-one million, two hundred ninety-two thousand, eight hundred seventeen".