857347573 has 2 divisors, whose sum is σ = 857347574. Its totient is φ = 857347572.

The previous prime is 857347571. The next prime is 857347607. The reversal of 857347573 is 375743758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 854860644 + 2486929 = 29238^2 + 1577^2 .

It is a cyclic number.

It is not a de Polignac number, because 857347573 - 2¹ = 857347571 is a prime.

Together with 857347571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857347571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428673786 + 428673787.

It is an arithmetic number, because the mean of its divisors is an integer number (428673787).

Almost surely, 2^857347573 is an apocalyptic number.

It is an amenable number.

857347573 is a deficient number, since it is larger than the sum of its proper divisors (1).

857347573 is an equidigital number, since it uses as much as digits as its factorization.

857347573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2469600, while the sum is 49.

The square root of 857347573 is about 29280.4981685763. The cubic root of 857347573 is about 949.9898698827.

The spelling of 857347573 in words is "eight hundred fifty-seven million, three hundred forty-seven thousand, five hundred seventy-three".