6479729 has 2 divisors, whose sum is σ = 6479730. Its totient is φ = 6479728.

The previous prime is 6479701. The next prime is 6479743. The reversal of 6479729 is 9279746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6477025 + 2704 = 2545^2 + 52^2 .

It is a cyclic number.

It is not a de Polignac number, because 6479729 - 2¹⁶ = 6414193 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6479729.

It is not a weakly prime, because it can be changed into another prime (6479929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3239864 + 3239865.

It is an arithmetic number, because the mean of its divisors is an integer number (3239865).

Almost surely, 2^6479729 is an apocalyptic number.

It is an amenable number.

6479729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6479729 is an equidigital number, since it uses as much as digits as its factorization.

6479729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 6479729 is about 2545.5311822879. The cubic root of 6479729 is about 186.4313513704.

The spelling of 6479729 in words is "six million, four hundred seventy-nine thousand, seven hundred twenty-nine".