857319494 has 4 divisors (see below), whose sum is σ = 1285979244. Its totient is φ = 428659746.

The previous prime is 857319487. The next prime is 857319497. The reversal of 857319494 is 494913758.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857319497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214329872 + ... + 214329875.

It is an arithmetic number, because the mean of its divisors is an integer number (321494811).

Almost surely, 2^857319494 is an apocalyptic number.

857319494 is a deficient number, since it is larger than the sum of its proper divisors (428659750).

857319494 is a wasteful number, since it uses less digits than its factorization.

857319494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428659749.

The product of its digits is 1088640, while the sum is 50.

The square root of 857319494 is about 29280.0186816880. The cubic root of 857319494 is about 949.9794987266.

The spelling of 857319494 in words is "eight hundred fifty-seven million, three hundred nineteen thousand, four hundred ninety-four".