6464729 has 2 divisors, whose sum is σ = 6464730. Its totient is φ = 6464728.

The previous prime is 6464723. The next prime is 6464741. The reversal of 6464729 is 9274646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4579600 + 1885129 = 2140^2 + 1373^2 .

It is a cyclic number.

It is not a de Polignac number, because 6464729 - 2⁴ = 6464713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6464692 and 6464701.

It is not a weakly prime, because it can be changed into another prime (6464723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3232364 + 3232365.

It is an arithmetic number, because the mean of its divisors is an integer number (3232365).

Almost surely, 2^6464729 is an apocalyptic number.

It is an amenable number.

6464729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6464729 is an equidigital number, since it uses as much as digits as its factorization.

6464729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 6464729 is about 2542.5831353173. The cubic root of 6464729 is about 186.2873828541.

The spelling of 6464729 in words is "six million, four hundred sixty-four thousand, seven hundred twenty-nine".