8992108921 has 2 divisors, whose sum is σ = 8992108922. Its totient is φ = 8992108920.

The previous prime is 8992108901. The next prime is 8992108933. The reversal of 8992108921 is 1298012998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8174148921 + 817960000 = 90411^2 + 28600^2 .

It is a cyclic number.

It is not a de Polignac number, because 8992108921 - 2²¹ = 8990011769 is a prime.

It is not a weakly prime, because it can be changed into another prime (8992108901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4496054460 + 4496054461.

It is an arithmetic number, because the mean of its divisors is an integer number (4496054461).

Almost surely, 2^8992108921 is an apocalyptic number.

It is an amenable number.

8992108921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8992108921 is an equidigital number, since it uses as much as digits as its factorization.

8992108921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 8992108921 is about 94826.7310466832. The cubic root of 8992108921 is about 2079.4757154469.

The spelling of 8992108921 in words is "eight billion, nine hundred ninety-two million, one hundred eight thousand, nine hundred twenty-one".