857253893 has 8 divisors (see below), whose sum is σ = 880776960. Its totient is φ = 834030720.

The previous prime is 857253889. The next prime is 857253899. The reversal of 857253893 is 398352758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 857253893 - 2² = 857253889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857253899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69173 + ... + 80618.

It is an arithmetic number, because the mean of its divisors is an integer number (110097120).

Almost surely, 2^857253893 is an apocalyptic number.

It is an amenable number.

857253893 is a deficient number, since it is larger than the sum of its proper divisors (23523067).

857253893 is a wasteful number, since it uses less digits than its factorization.

857253893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149947.

The product of its digits is 1814400, while the sum is 50.

The square root of 857253893 is about 29278.8984253165. The cubic root of 857253893 is about 949.9552676998.

The spelling of 857253893 in words is "eight hundred fifty-seven million, two hundred fifty-three thousand, eight hundred ninety-three".