653538 has 8 divisors (see below), whose sum is σ = 1307088. Its totient is φ = 217844.

The previous prime is 653537. The next prime is 653539. The reversal of 653538 is 835356.

It is an interprime number because it is at equal distance from previous prime (653537) and next prime (653539).

It is a sphenic number, since it is the product of 3 distinct primes.

653538 is an admirable number.

It is a super-2 number, since 2×653538² = 854223834888, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6 + 5² + 5⁸ + 3² + 3⁶ + 8⁶ .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (653537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54456 + ... + 54467.

It is an arithmetic number, because the mean of its divisors is an integer number (163386).

2⁶⁵³⁵³⁸ is an apocalyptic number.

653538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

653538 is a wasteful number, since it uses less digits than its factorization.

653538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108928.

The product of its digits is 10800, while the sum is 30.

The square root of 653538 is about 808.4169716180. The cubic root of 653538 is about 86.7807931056.

The spelling of 653538 in words is "six hundred fifty-three thousand, five hundred thirty-eight".