857143723 has 8 divisors (see below), whose sum is σ = 916047792. Its totient is φ = 799182336.

The previous prime is 857143717. The next prime is 857143753. The reversal of 857143723 is 327341758.

It is a happy number.

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 857143723 - 2²¹ = 855046571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857143753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233790 + ... + 237427.

It is an arithmetic number, because the mean of its divisors is an integer number (114505974).

Almost surely, 2^857143723 is an apocalyptic number.

857143723 is a deficient number, since it is larger than the sum of its proper divisors (58904069).

857143723 is a wasteful number, since it uses less digits than its factorization.

857143723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471341.

The product of its digits is 141120, while the sum is 40.

The square root of 857143723 is about 29277.0169757781. The cubic root of 857143723 is about 949.9145714501.

The spelling of 857143723 in words is "eight hundred fifty-seven million, one hundred forty-three thousand, seven hundred twenty-three".