624891 has 12 divisors (see below), whose sum is σ = 880872. Its totient is φ = 393984.

The previous prime is 624859. The next prime is 624917. The reversal of 624891 is 198426.

It is not a de Polignac number, because 624891 - 2⁵ = 624859 is a prime.

It is the 791-st Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624851) by changing a digit.

It is a nontrivial repunit in base 790.

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 11 ways as a sum of consecutive naturals, for example, 795 + ... + 1371.

It is an arithmetic number, because the mean of its divisors is an integer number (73406).

2⁶²⁴⁸⁹¹ is an apocalyptic number.

624891 is a deficient number, since it is larger than the sum of its proper divisors (255981).

624891 is a wasteful number, since it uses less digits than its factorization.

624891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 599 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 624891 is about 790.5004743832. The cubic root of 624891 is about 85.4938267148.

The spelling of 624891 in words is "six hundred twenty-four thousand, eight hundred ninety-one".