653217 has 4 divisors (see below), whose sum is σ = 870960. Its totient is φ = 435476.

The previous prime is 653209. The next prime is 653243. The reversal of 653217 is 712356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 653217 - 2³ = 653209 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (653207) 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, 108867 + ... + 108872.

It is an arithmetic number, because the mean of its divisors is an integer number (217740).

2⁶⁵³²¹⁷ is an apocalyptic number.

It is an amenable number.

653217 is a deficient number, since it is larger than the sum of its proper divisors (217743).

653217 is a wasteful number, since it uses less digits than its factorization.

653217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217742.

The product of its digits is 1260, while the sum is 24.

The square root of 653217 is about 808.2184110746. The cubic root of 653217 is about 86.7665826610.

The spelling of 653217 in words is "six hundred fifty-three thousand, two hundred seventeen".