500478421 has 2 divisors, whose sum is σ = 500478422. Its totient is φ = 500478420.

The previous prime is 500478403. The next prime is 500478427. The reversal of 500478421 is 124874005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499299025 + 1179396 = 22345^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 500478421 - 2⁵ = 500478389 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 (500478427) 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, 250239210 + 250239211.

It is an arithmetic number, because the mean of its divisors is an integer number (250239211).

Almost surely, 2^500478421 is an apocalyptic number.

It is an amenable number.

500478421 is a deficient number, since it is larger than the sum of its proper divisors (1).

500478421 is an equidigital number, since it uses as much as digits as its factorization.

500478421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 500478421 is about 22371.3750359695. The cubic root of 500478421 is about 793.9535939521.

The spelling of 500478421 in words is "five hundred million, four hundred seventy-eight thousand, four hundred twenty-one".