653539 has 2 divisors, whose sum is σ = 653540. Its totient is φ = 653538.

The previous prime is 653537. The next prime is 653561. The reversal of 653539 is 935356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653539 - 2¹ = 653537 is a prime.

It is a super-2 number, since 2×653539² = 854226449042, which contains 22 as substring.

Together with 653537, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 653539.

It is not a weakly prime, because it can be changed into another prime (653537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326769 + 326770.

It is an arithmetic number, because the mean of its divisors is an integer number (326770).

2⁶⁵³⁵³⁹ is an apocalyptic number.

653539 is a deficient number, since it is larger than the sum of its proper divisors (1).

653539 is an equidigital number, since it uses as much as digits as its factorization.

653539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12150, while the sum is 31.

The square root of 653539 is about 808.4175901105. The cubic root of 653539 is about 86.7808373676.

The spelling of 653539 in words is "six hundred fifty-three thousand, five hundred thirty-nine".