3929729 has 2 divisors, whose sum is σ = 3929730. Its totient is φ = 3929728.

The previous prime is 3929719. The next prime is 3929741. The reversal of 3929729 is 9279293.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3055504 + 874225 = 1748^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 3929729 - 2¹⁶ = 3864193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3929719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964864 + 1964865.

It is an arithmetic number, because the mean of its divisors is an integer number (1964865).

Almost surely, 2^3929729 is an apocalyptic number.

It is an amenable number.

3929729 is a deficient number, since it is larger than the sum of its proper divisors (1).

3929729 is an equidigital number, since it uses as much as digits as its factorization.

3929729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 41.

The square root of 3929729 is about 1982.3544082732. The cubic root of 3929729 is about 157.8050391336.

The spelling of 3929729 in words is "three million, nine hundred twenty-nine thousand, seven hundred twenty-nine".