624539 has 2 divisors, whose sum is σ = 624540. Its totient is φ = 624538.

The previous prime is 624521. The next prime is 624541. The reversal of 624539 is 935426.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-624539 is a prime.

Together with 624541, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6³ + 2¹³ + 5⁷ + 4 + 3¹² + 9⁴ .

It is not a weakly prime, because it can be changed into another prime (624509) 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 as a sum of consecutive naturals, namely, 312269 + 312270.

It is an arithmetic number, because the mean of its divisors is an integer number (312270).

2⁶²⁴⁵³⁹ is an apocalyptic number.

624539 is a deficient number, since it is larger than the sum of its proper divisors (1).

624539 is an equidigital number, since it uses as much as digits as its factorization.

624539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 624539 is about 790.2777992580. The cubic root of 624539 is about 85.4777708590.

The spelling of 624539 in words is "six hundred twenty-four thousand, five hundred thirty-nine".