8904271921 has 2 divisors, whose sum is σ = 8904271922. Its totient is φ = 8904271920.

The previous prime is 8904271919. The next prime is 8904271979. The reversal of 8904271921 is 1291724098.

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., 7861304896 + 1042967025 = 88664^2 + 32295^2 .

It is a cyclic number.

It is not a de Polignac number, because 8904271921 - 2¹ = 8904271919 is a prime.

Together with 8904271919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8904271991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4452135960 + 4452135961.

It is an arithmetic number, because the mean of its divisors is an integer number (4452135961).

Almost surely, 2^8904271921 is an apocalyptic number.

It is an amenable number.

8904271921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8904271921 is an equidigital number, since it uses as much as digits as its factorization.

8904271921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 8904271921 is about 94362.4497403496. The cubic root of 8904271921 is about 2072.6826150672.

The spelling of 8904271921 in words is "eight billion, nine hundred four million, two hundred seventy-one thousand, nine hundred twenty-one".