857944300793 has 4 divisors (see below), whose sum is σ = 872485729680. Its totient is φ = 843402871908.

The previous prime is 857944300771. The next prime is 857944300813. The reversal of 857944300793 is 397003449758.

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, and also an emirpimes, since its reverse is a distinct semiprime: 397003449758 = 2 ⋅198501724879.

It is a cyclic number.

It is not a de Polignac number, because 857944300793 - 2⁶ = 857944300729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 14541428827 = 857944300793 / (8 + 5 + 7 + 9 + 4 + 4 + 3 + 0 + 0 + 7 + 9 + 3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (857944300723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7270714355 + ... + 7270714472.

It is an arithmetic number, because the mean of its divisors is an integer number (218121432420).

Almost surely, 2^857944300793 is an apocalyptic number.

It is an amenable number.

857944300793 is a deficient number, since it is larger than the sum of its proper divisors (14541428887).

857944300793 is a wasteful number, since it uses less digits than its factorization.

857944300793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14541428886.

The product of its (nonzero) digits is 22861440, while the sum is 59.

The spelling of 857944300793 in words is "eight hundred fifty-seven billion, nine hundred forty-four million, three hundred thousand, seven hundred ninety-three".