653857 has 4 divisors (see below), whose sum is σ = 656260. Its totient is φ = 651456.

The previous prime is 653831. The next prime is 653879. The reversal of 653857 is 758356.

It is a happy number.

653857 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 can be written as a sum of positive squares in 2 ways, for example, as 239121 + 414736 = 489^2 + 644^2 .

It is a cyclic number.

It is not a de Polignac number, because 653857 - 2¹¹ = 651809 is a prime.

It is a Duffinian number.

653857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (653057) 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, 732 + ... + 1357.

It is an arithmetic number, because the mean of its divisors is an integer number (164065).

2⁶⁵³⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

653857 is a deficient number, since it is larger than the sum of its proper divisors (2403).

653857 is a wasteful number, since it uses less digits than its factorization.

653857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402.

The product of its digits is 25200, while the sum is 34.

The square root of 653857 is about 808.6142467209. The cubic root of 653857 is about 86.7949104026.

The spelling of 653857 in words is "six hundred fifty-three thousand, eight hundred fifty-seven".