857302243 has 4 divisors (see below), whose sum is σ = 979774000. Its totient is φ = 734830488.

The previous prime is 857302219. The next prime is 857302261. The reversal of 857302243 is 342203758.

857302243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-857302243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857302199 and 857302208.

It is not an unprimeable number, because it can be changed into a prime (857303243) 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, 61235868 + ... + 61235881.

It is an arithmetic number, because the mean of its divisors is an integer number (244943500).

Almost surely, 2^857302243 is an apocalyptic number.

857302243 is a deficient number, since it is larger than the sum of its proper divisors (122471757).

857302243 is a wasteful number, since it uses less digits than its factorization.

857302243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122471756.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 857302243 is about 29279.7240936454. The cubic root of 857302243 is about 949.9731268483.

The spelling of 857302243 in words is "eight hundred fifty-seven million, three hundred two thousand, two hundred forty-three".