6481729 has 2 divisors, whose sum is σ = 6481730. Its totient is φ = 6481728.

The previous prime is 6481711. The next prime is 6481747. The reversal of 6481729 is 9271846.

It is a balanced prime because it is at equal distance from previous prime (6481711) and next prime (6481747).

It can be written as a sum of positive squares in only one way, i.e., 4739329 + 1742400 = 2177^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 6481729 - 2⁹ = 6481217 is a prime.

6481729 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6481789) 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, 3240864 + 3240865.

It is an arithmetic number, because the mean of its divisors is an integer number (3240865).

Almost surely, 2^6481729 is an apocalyptic number.

It is an amenable number.

6481729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6481729 is an equidigital number, since it uses as much as digits as its factorization.

6481729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 6481729 is about 2545.9239972945. The cubic root of 6481729 is about 186.4505303796.

It can be divided in two parts, 64817 and 29, that added together give a palindrome (64846).

The spelling of 6481729 in words is "six million, four hundred eighty-one thousand, seven hundred twenty-nine".