501944459 has 2 divisors, whose sum is σ = 501944460. Its totient is φ = 501944458.

The previous prime is 501944411. The next prime is 501944477. The reversal of 501944459 is 954449105.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 501944459 - 2²⁰ = 500895883 is a prime.

It is not a weakly prime, because it can be changed into another prime (501944659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250972229 + 250972230.

It is an arithmetic number, because the mean of its divisors is an integer number (250972230).

Almost surely, 2^501944459 is an apocalyptic number.

501944459 is a deficient number, since it is larger than the sum of its proper divisors (1).

501944459 is an equidigital number, since it uses as much as digits as its factorization.

501944459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 501944459 is about 22404.1170100497. The cubic root of 501944459 is about 794.7280738705.

The spelling of 501944459 in words is "five hundred one million, nine hundred forty-four thousand, four hundred fifty-nine".