653543 has 16 divisors (see below), whose sum is σ = 777600. Its totient is φ = 542880.

The previous prime is 653539. The next prime is 653561. The reversal of 653543 is 345356.

It is a cyclic number.

It is not a de Polignac number, because 653543 - 2² = 653539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11048 + ... + 11106.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2⁶⁵³⁵⁴³ is an apocalyptic number.

653543 is a deficient number, since it is larger than the sum of its proper divisors (124057).

653543 is a wasteful number, since it uses less digits than its factorization.

653543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142.

The product of its digits is 5400, while the sum is 26.

The square root of 653543 is about 808.4200640756. The cubic root of 653543 is about 86.7810144153.

Adding to 653543 its reverse (345356), we get a palindrome (998899).

The spelling of 653543 in words is "six hundred fifty-three thousand, five hundred forty-three".