857517404197 has 4 divisors (see below), whose sum is σ = 861581467936. Its totient is φ = 853453340460.

The previous prime is 857517404189. The next prime is 857517404201. The reversal of 857517404197 is 791404715758.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 857517404197 - 2³ = 857517404189 is a prime.

It is a super-2 number, since 2×857517404197² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857517404167) 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, 2032031553 + ... + 2032031974.

It is an arithmetic number, because the mean of its divisors is an integer number (215395366984).

Almost surely, 2^857517404197 is an apocalyptic number.

It is an amenable number.

857517404197 is a deficient number, since it is larger than the sum of its proper divisors (4064063739).

857517404197 is a wasteful number, since it uses less digits than its factorization.

857517404197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064063738.

The product of its (nonzero) digits is 9878400, while the sum is 58.

The spelling of 857517404197 in words is "eight hundred fifty-seven billion, five hundred seventeen million, four hundred four thousand, one hundred ninety-seven".