500667421 has 2 divisors, whose sum is σ = 500667422. Its totient is φ = 500667420.

The previous prime is 500667389. The next prime is 500667437. The reversal of 500667421 is 124766005.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494840025 + 5827396 = 22245^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 500667421 - 2⁵ = 500667389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500667491) 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, 250333710 + 250333711.

It is an arithmetic number, because the mean of its divisors is an integer number (250333711).

Almost surely, 2^500667421 is an apocalyptic number.

It is an amenable number.

500667421 is a deficient number, since it is larger than the sum of its proper divisors (1).

500667421 is an equidigital number, since it uses as much as digits as its factorization.

500667421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 500667421 is about 22375.5987852839. The cubic root of 500667421 is about 794.0535238977.

It can be divided in two parts, 5006 and 67421, that added together give a palindrome (72427).

The spelling of 500667421 in words is "five hundred million, six hundred sixty-seven thousand, four hundred twenty-one".