3987689435 has 4 divisors (see below), whose sum is σ = 4785227328. Its totient is φ = 3190151544.

The previous prime is 3987689417. The next prime is 3987689437. The reversal of 3987689435 is 5349867893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5349867893 = 59 ⋅90675727.

It is a cyclic number.

It is not a de Polignac number, because 3987689435 - 2¹⁸ = 3987427291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3987689437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398768939 + ... + 398768948.

It is an arithmetic number, because the mean of its divisors is an integer number (1196306832).

Almost surely, 2^3987689435 is an apocalyptic number.

3987689435 is a deficient number, since it is larger than the sum of its proper divisors (797537893).

3987689435 is an equidigital number, since it uses as much as digits as its factorization.

3987689435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797537892.

The product of its digits is 39191040, while the sum is 62.

The square root of 3987689435 is about 63148.1546444550. The cubic root of 3987689435 is about 1585.7708948238.

The spelling of 3987689435 in words is "three billion, nine hundred eighty-seven million, six hundred eighty-nine thousand, four hundred thirty-five".