3946435729 has 2 divisors, whose sum is σ = 3946435730. Its totient is φ = 3946435728.

The previous prime is 3946435723. The next prime is 3946435751. The reversal of 3946435729 is 9275346493.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3902875729 + 43560000 = 62473^2 + 6600^2 .

It is a cyclic number.

It is not a de Polignac number, because 3946435729 - 2²¹ = 3944338577 is a prime.

It is a super-2 number, since 2×3946435729² = 31148709926255522882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3946435723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973217864 + 1973217865.

It is an arithmetic number, because the mean of its divisors is an integer number (1973217865).

Almost surely, 2^3946435729 is an apocalyptic number.

It is an amenable number.

3946435729 is a deficient number, since it is larger than the sum of its proper divisors (1).

3946435729 is an equidigital number, since it uses as much as digits as its factorization.

3946435729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 52.

The square root of 3946435729 is about 62820.6632327294. The cubic root of 3946435729 is about 1580.2835213314.

The spelling of 3946435729 in words is "three billion, nine hundred forty-six million, four hundred thirty-five thousand, seven hundred twenty-nine".