3946729329 has 27 divisors (see below), whose sum is σ = 5848501113. Its totient is φ = 2564686152.

The previous prime is 3946729309. The next prime is 3946729351. The reversal of 3946729329 is 9239276493.

The square root of 3946729329 is 62823.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 3946729329 - 2⁷ = 3946729201 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3946729309) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8103924 + ... + 8104410.

Almost surely, 2^3946729329 is an apocalyptic number.

3946729329 is the 62823-rd square number.

3946729329 is the 31412-nd centered octagonal number.

It is an amenable number.

3946729329 is a deficient number, since it is larger than the sum of its proper divisors (1901771784).

3946729329 is an frugal number, since it uses more digits than its factorization.

3946729329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 533 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The cubic root of 3946729329 is about 1580.3227094131.

The spelling of 3946729329 in words is "three billion, nine hundred forty-six million, seven hundred twenty-nine thousand, three hundred twenty-nine".