508664621 has 2 divisors, whose sum is σ = 508664622. Its totient is φ = 508664620.

The previous prime is 508664557. The next prime is 508664659. The reversal of 508664621 is 126466805.

It is an a-pointer prime, because the next prime (508664659) can be obtained adding 508664621 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295358596 + 213306025 = 17186^2 + 14605^2 .

It is a cyclic number.

It is not a de Polignac number, because 508664621 - 2⁶ = 508664557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (508663621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254332310 + 254332311.

It is an arithmetic number, because the mean of its divisors is an integer number (254332311).

Almost surely, 2^508664621 is an apocalyptic number.

It is an amenable number.

508664621 is a deficient number, since it is larger than the sum of its proper divisors (1).

508664621 is an equidigital number, since it uses as much as digits as its factorization.

508664621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 508664621 is about 22553.5944141948. The cubic root of 508664621 is about 798.2590374978.

The spelling of 508664621 in words is "five hundred eight million, six hundred sixty-four thousand, six hundred twenty-one".