857144443 has 4 divisors (see below), whose sum is σ = 857431008. Its totient is φ = 856857880.

The previous prime is 857144429. The next prime is 857144501. The reversal of 857144443 is 344441758.

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

It is a cyclic number.

It is not a de Polignac number, because 857144443 - 2⁵ = 857144411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857144396 and 857144405.

It is not an unprimeable number, because it can be changed into a prime (857147443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138748 + ... + 144793.

It is an arithmetic number, because the mean of its divisors is an integer number (214357752).

Almost surely, 2^857144443 is an apocalyptic number.

857144443 is a deficient number, since it is larger than the sum of its proper divisors (286565).

857144443 is a wasteful number, since it uses less digits than its factorization.

857144443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286564.

The product of its digits is 215040, while the sum is 40.

The square root of 857144443 is about 29277.0292721102. The cubic root of 857144443 is about 949.9148374259.

The spelling of 857144443 in words is "eight hundred fifty-seven million, one hundred forty-four thousand, four hundred forty-three".