653291 has 4 divisors (see below), whose sum is σ = 654912. Its totient is φ = 651672.

The previous prime is 653281. The next prime is 653311. The reversal of 653291 is 192356.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653291 is a prime.

It is a Duffinian number.

Its product of digits (1620) is a multiple of the sum of its prime divisors (1620).

It is a self number, because there is not a number n which added to its sum of digits gives 653291.

It is not an unprimeable number, because it can be changed into a prime (653281) 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, 326 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (163728).

2⁶⁵³²⁹¹ is an apocalyptic number.

653291 is a deficient number, since it is larger than the sum of its proper divisors (1621).

653291 is an equidigital number, since it uses as much as digits as its factorization.

653291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620.

The product of its digits is 1620, while the sum is 26.

The square root of 653291 is about 808.2641894826. The cubic root of 653291 is about 86.7698590019.

The spelling of 653291 in words is "six hundred fifty-three thousand, two hundred ninety-one".