858980321 has 2 divisors, whose sum is σ = 858980322. Its totient is φ = 858980320.

The previous prime is 858980279. The next prime is 858980323. The reversal of 858980321 is 123089858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741799696 + 117180625 = 27236^2 + 10825^2 .

It is a cyclic number.

It is not a de Polignac number, because 858980321 - 2¹⁸ = 858718177 is a prime.

Together with 858980323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (858980323) 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, 429490160 + 429490161.

It is an arithmetic number, because the mean of its divisors is an integer number (429490161).

Almost surely, 2^858980321 is an apocalyptic number.

It is an amenable number.

858980321 is a deficient number, since it is larger than the sum of its proper divisors (1).

858980321 is an equidigital number, since it uses as much as digits as its factorization.

858980321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 858980321 is about 29308.3660581753. The cubic root of 858980321 is about 950.5925466755.

The spelling of 858980321 in words is "eight hundred fifty-eight million, nine hundred eighty thousand, three hundred twenty-one".