857397 has 8 divisors (see below), whose sum is σ = 1150240. Its totient is φ = 568080.

The previous prime is 857369. The next prime is 857407. The reversal of 857397 is 793758.

857397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 857397 - 2⁶ = 857333 is a prime.

It is a d-powerful number, because it can be written as 8⁵ + 5 + 3⁶ + 7³ + 9 + 7⁷ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857347) 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, 247 + ... + 1332.

It is an arithmetic number, because the mean of its divisors is an integer number (143780).

857397 is a Friedman number, since it can be written as 95^3+8+7+7, using all its digits and the basic arithmetic operations.

2⁸⁵⁷³⁹⁷ is an apocalyptic number.

It is an amenable number.

857397 is a deficient number, since it is larger than the sum of its proper divisors (292843).

857397 is a wasteful number, since it uses less digits than its factorization.

857397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763.

The product of its digits is 52920, while the sum is 39.

The square root of 857397 is about 925.9573424300. The cubic root of 857397 is about 95.0008125508. Note that the first 3 decimals are identical.

The spelling of 857397 in words is "eight hundred fifty-seven thousand, three hundred ninety-seven".