624345121 has 2 divisors, whose sum is σ = 624345122. Its totient is φ = 624345120.

The previous prime is 624345091. The next prime is 624345191. The reversal of 624345121 is 121543426.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 617771025 + 6574096 = 24855^2 + 2564^2 .

It is a cyclic number.

It is not a de Polignac number, because 624345121 - 2²⁹ = 87474209 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 624345121.

It is not a weakly prime, because it can be changed into another prime (624345191) 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, 312172560 + 312172561.

It is an arithmetic number, because the mean of its divisors is an integer number (312172561).

Almost surely, 2^624345121 is an apocalyptic number.

It is an amenable number.

624345121 is a deficient number, since it is larger than the sum of its proper divisors (1).

624345121 is an equidigital number, since it uses as much as digits as its factorization.

624345121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 624345121 is about 24986.8989872693. The cubic root of 624345121 is about 854.6892483553.

Adding to 624345121 its reverse (121543426), we get a palindrome (745888547).

The spelling of 624345121 in words is "six hundred twenty-four million, three hundred forty-five thousand, one hundred twenty-one".