624555623 has 2 divisors, whose sum is σ = 624555624. Its totient is φ = 624555622.

The previous prime is 624555563. The next prime is 624555653. The reversal of 624555623 is 326555426.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 624555623 - 2¹⁴ = 624539239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624555653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312277811 + 312277812.

It is an arithmetic number, because the mean of its divisors is an integer number (312277812).

Almost surely, 2^624555623 is an apocalyptic number.

624555623 is a deficient number, since it is larger than the sum of its proper divisors (1).

624555623 is an equidigital number, since it uses as much as digits as its factorization.

624555623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 38.

The square root of 624555623 is about 24991.1108796708. The cubic root of 624555623 is about 854.7852922334.

The spelling of 624555623 in words is "six hundred twenty-four million, five hundred fifty-five thousand, six hundred twenty-three".