3985543429 has 12 divisors (see below), whose sum is σ = 4647280908. Its totient is φ = 3408048000.

The previous prime is 3985543391. The next prime is 3985543433. The reversal of 3985543429 is 9243455893.

It can be written as a sum of positive squares in 2 ways, for example, as 598536225 + 3387007204 = 24465^2 + 58198^2 .

It is not a de Polignac number, because 3985543429 - 2¹³ = 3985535237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985546429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75972 + ... + 117229.

It is an arithmetic number, because the mean of its divisors is an integer number (387273409).

Almost surely, 2^3985543429 is an apocalyptic number.

It is an amenable number.

3985543429 is a deficient number, since it is larger than the sum of its proper divisors (661737479).

3985543429 is a wasteful number, since it uses less digits than its factorization.

3985543429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193636 (or 193629 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 52.

The square root of 3985543429 is about 63131.1605231521. The cubic root of 3985543429 is about 1585.4863788105.

The spelling of 3985543429 in words is "three billion, nine hundred eighty-five million, five hundred forty-three thousand, four hundred twenty-nine".