857072293 has 16 divisors (see below), whose sum is σ = 1105407360. Its totient is φ = 644817600.

The previous prime is 857072261. The next prime is 857072317. The reversal of 857072293 is 392270758.

857072293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 857072293 - 2⁵ = 857072261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857072233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189678 + ... + 194143.

It is an arithmetic number, because the mean of its divisors is an integer number (69087960).

Almost surely, 2^857072293 is an apocalyptic number.

It is an amenable number.

857072293 is a deficient number, since it is larger than the sum of its proper divisors (248335067).

857072293 is a wasteful number, since it uses less digits than its factorization.

857072293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383868.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 857072293 is about 29275.7970514895. The cubic root of 857072293 is about 949.8881837002. Note that the first 3 decimals are identical.

The spelling of 857072293 in words is "eight hundred fifty-seven million, seventy-two thousand, two hundred ninety-three".