857361893 has 4 divisors (see below), whose sum is σ = 871417068. Its totient is φ = 843306720.

The previous prime is 857361881. The next prime is 857361899. The reversal of 857361893 is 398163758.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 116596804 + 740765089 = 10798^2 + 27217^2 .

It is a cyclic number.

It is not a de Polignac number, because 857361893 - 2¹² = 857357797 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 (857361899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7027496 + ... + 7027617.

It is an arithmetic number, because the mean of its divisors is an integer number (217854267).

Almost surely, 2^857361893 is an apocalyptic number.

It is an amenable number.

857361893 is a deficient number, since it is larger than the sum of its proper divisors (14055175).

857361893 is a wasteful number, since it uses less digits than its factorization.

857361893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14055174.

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

The square root of 857361893 is about 29280.7426989139. The cubic root of 857361893 is about 949.9951589781.

The spelling of 857361893 in words is "eight hundred fifty-seven million, three hundred sixty-one thousand, eight hundred ninety-three".