620455523 has 2 divisors, whose sum is σ = 620455524. Its totient is φ = 620455522.

The previous prime is 620455513. The next prime is 620455529. The reversal of 620455523 is 325554026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620455523 - 2²⁰ = 619406947 is a prime.

It is equal to p_32335880 and since 620455523 and 32335880 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620455523.

It is not a weakly prime, because it can be changed into another prime (620455529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310227761 + 310227762.

It is an arithmetic number, because the mean of its divisors is an integer number (310227762).

Almost surely, 2^620455523 is an apocalyptic number.

620455523 is a deficient number, since it is larger than the sum of its proper divisors (1).

620455523 is an equidigital number, since it uses as much as digits as its factorization.

620455523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 620455523 is about 24908.9446384226. The cubic root of 620455523 is about 852.9106780262.

The spelling of 620455523 in words is "six hundred twenty million, four hundred fifty-five thousand, five hundred twenty-three".