857990327 has 2 divisors, whose sum is σ = 857990328. Its totient is φ = 857990326.

The previous prime is 857990303. The next prime is 857990333. The reversal of 857990327 is 723099758.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 857990327 - 2¹² = 857986231 is a prime.

It is a super-2 number, since 2×857990327² = 1472294802451133858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857990377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428995163 + 428995164.

It is an arithmetic number, because the mean of its divisors is an integer number (428995164).

Almost surely, 2^857990327 is an apocalyptic number.

857990327 is a deficient number, since it is larger than the sum of its proper divisors (1).

857990327 is an equidigital number, since it uses as much as digits as its factorization.

857990327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 50.

The square root of 857990327 is about 29291.4719159007. The cubic root of 857990327 is about 950.2272132427.

The spelling of 857990327 in words is "eight hundred fifty-seven million, nine hundred ninety thousand, three hundred twenty-seven".