8858191021 has 2 divisors, whose sum is σ = 8858191022. Its totient is φ = 8858191020.

The previous prime is 8858190983. The next prime is 8858191031. The reversal of 8858191021 is 1201918588.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8502868521 + 355322500 = 92211^2 + 18850^2 .

It is a cyclic number.

It is not a de Polignac number, because 8858191021 - 2⁷ = 8858190893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8858191031) 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, 4429095510 + 4429095511.

It is an arithmetic number, because the mean of its divisors is an integer number (4429095511).

Almost surely, 2^8858191021 is an apocalyptic number.

It is an amenable number.

8858191021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8858191021 is an equidigital number, since it uses as much as digits as its factorization.

8858191021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 43.

The square root of 8858191021 is about 94117.9633279429. The cubic root of 8858191021 is about 2069.1009515786.

The spelling of 8858191021 in words is "eight billion, eight hundred fifty-eight million, one hundred ninety-one thousand, twenty-one".