857703349 has 2 divisors, whose sum is σ = 857703350. Its totient is φ = 857703348.

The previous prime is 857703337. The next prime is 857703367. The reversal of 857703349 is 943307758.

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., 432931249 + 424772100 = 20807^2 + 20610^2 .

It is a cyclic number.

It is not a de Polignac number, because 857703349 - 2⁵ = 857703317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 857703299 and 857703308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857703389) 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, 428851674 + 428851675.

It is an arithmetic number, because the mean of its divisors is an integer number (428851675).

Almost surely, 2^857703349 is an apocalyptic number.

It is an amenable number.

857703349 is a deficient number, since it is larger than the sum of its proper divisors (1).

857703349 is an equidigital number, since it uses as much as digits as its factorization.

857703349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 857703349 is about 29286.5728449062. The cubic root of 857703349 is about 950.1212583908.

The spelling of 857703349 in words is "eight hundred fifty-seven million, seven hundred three thousand, three hundred forty-nine".