624659 has 4 divisors (see below), whose sum is σ = 713904. Its totient is φ = 535416.

The previous prime is 624649. The next prime is 624667. The reversal of 624659 is 956426.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956426 = 2 ⋅478213.

It is not a de Polignac number, because 624659 - 2⁴ = 624643 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44612 + ... + 44625.

It is an arithmetic number, because the mean of its divisors is an integer number (178476).

2⁶²⁴⁶⁵⁹ is an apocalyptic number.

624659 is a deficient number, since it is larger than the sum of its proper divisors (89245).

624659 is an equidigital number, since it uses as much as digits as its factorization.

624659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89244.

The product of its digits is 12960, while the sum is 32.

The square root of 624659 is about 790.3537182806. The cubic root of 624659 is about 85.4832451238.

The spelling of 624659 in words is "six hundred twenty-four thousand, six hundred fifty-nine".