501279469729 has 2 divisors, whose sum is σ = 501279469730. Its totient is φ = 501279469728.

The previous prime is 501279469703. The next prime is 501279469763. The reversal of 501279469729 is 927964972105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 464435435025 + 36844034704 = 681495^2 + 191948^2 .

It is a cyclic number.

It is not a de Polignac number, because 501279469729 - 2¹¹ = 501279467681 is a prime.

It is a super-2 number, since 2×501279469729² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (501279499729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250639734864 + 250639734865.

It is an arithmetic number, because the mean of its divisors is an integer number (250639734865).

Almost surely, 2^501279469729 is an apocalyptic number.

It is an amenable number.

501279469729 is a deficient number, since it is larger than the sum of its proper divisors (1).

501279469729 is an equidigital number, since it uses as much as digits as its factorization.

501279469729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17146080, while the sum is 61.

The spelling of 501279469729 in words is "five hundred one billion, two hundred seventy-nine million, four hundred sixty-nine thousand, seven hundred twenty-nine".