3984316729 has 4 divisors (see below), whose sum is σ = 3984891876. Its totient is φ = 3983741584.

The previous prime is 3984316717. The next prime is 3984316733. The reversal of 3984316729 is 9276134893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9276134893 = 73 ⋅127070341.

It can be written as a sum of positive squares in 2 ways, for example, as 3334831504 + 649485225 = 57748^2 + 25485^2 .

It is a cyclic number.

It is not a de Polignac number, because 3984316729 - 2⁷ = 3984316601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3984316789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277054 + ... + 291079.

It is an arithmetic number, because the mean of its divisors is an integer number (996222969).

Almost surely, 2^3984316729 is an apocalyptic number.

It is an amenable number.

3984316729 is a deficient number, since it is larger than the sum of its proper divisors (575147).

3984316729 is an equidigital number, since it uses as much as digits as its factorization.

3984316729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575146.

The product of its digits is 1959552, while the sum is 52.

The square root of 3984316729 is about 63121.4442879755. Note that the first 3 decimals coincide. The cubic root of 3984316729 is about 1585.3236978821.

The spelling of 3984316729 in words is "three billion, nine hundred eighty-four million, three hundred sixteen thousand, seven hundred twenty-nine".