3940547329 has 2 divisors, whose sum is σ = 3940547330. Its totient is φ = 3940547328.

The previous prime is 3940547321. The next prime is 3940547339. The reversal of 3940547329 is 9237450493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2731107600 + 1209439729 = 52260^2 + 34777^2 .

It is an emirp because it is prime and its reverse (9237450493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3940547329 - 2³ = 3940547321 is a prime.

It is not a weakly prime, because it can be changed into another prime (3940547321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970273664 + 1970273665.

It is an arithmetic number, because the mean of its divisors is an integer number (1970273665).

Almost surely, 2^3940547329 is an apocalyptic number.

It is an amenable number.

3940547329 is a deficient number, since it is larger than the sum of its proper divisors (1).

3940547329 is an equidigital number, since it uses as much as digits as its factorization.

3940547329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 3940547329 is about 62773.7789925061. The cubic root of 3940547329 is about 1579.4971599940.

The spelling of 3940547329 in words is "three billion, nine hundred forty million, five hundred forty-seven thousand, three hundred twenty-nine".