4393729 has 2 divisors, whose sum is σ = 4393730. Its totient is φ = 4393728.

The previous prime is 4393717. The next prime is 4393751. The reversal of 4393729 is 9273934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3534400 + 859329 = 1880^2 + 927^2 .

It is a cyclic number.

It is not a de Polignac number, because 4393729 - 2⁹ = 4393217 is a prime.

It is a d-powerful number, because it can be written as 4¹¹ + 3⁹ + 9² + 3¹¹ + 7⁴ + 2⁵ + 9² .

It is not a weakly prime, because it can be changed into another prime (4393799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2196864 + 2196865.

It is an arithmetic number, because the mean of its divisors is an integer number (2196865).

Almost surely, 2^4393729 is an apocalyptic number.

It is an amenable number.

4393729 is a deficient number, since it is larger than the sum of its proper divisors (1).

4393729 is an equidigital number, since it uses as much as digits as its factorization.

4393729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 37.

The square root of 4393729 is about 2096.1223723819. The cubic root of 4393729 is about 163.7863691725.

The spelling of 4393729 in words is "four million, three hundred ninety-three thousand, seven hundred twenty-nine".