853729 has 4 divisors (see below), whose sum is σ = 856260. Its totient is φ = 851200.

The previous prime is 853717. The next prime is 853733. The reversal of 853729 is 927358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 927358 = 2 ⋅463679.

It can be written as a sum of positive squares in 2 ways, for example, as 603729 + 250000 = 777^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 853729 - 2⁹ = 853217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 853694 and 853703.

It is not an unprimeable number, because it can be changed into a prime (853739) 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, 664 + ... + 1465.

It is an arithmetic number, because the mean of its divisors is an integer number (214065).

2⁸⁵³⁷²⁹ is an apocalyptic number.

It is an amenable number.

853729 is a deficient number, since it is larger than the sum of its proper divisors (2531).

853729 is a wasteful number, since it uses less digits than its factorization.

853729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530.

The product of its digits is 15120, while the sum is 34.

The square root of 853729 is about 923.9745667495. The cubic root of 853729 is about 94.8651456891.

The spelling of 853729 in words is "eight hundred fifty-three thousand, seven hundred twenty-nine".