3989887547 has 2 divisors, whose sum is σ = 3989887548. Its totient is φ = 3989887546.

The previous prime is 3989887543. The next prime is 3989887549. The reversal of 3989887547 is 7457889893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3989887547 - 2² = 3989887543 is a prime.

Together with 3989887549, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3989887543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994943773 + 1994943774.

It is an arithmetic number, because the mean of its divisors is an integer number (1994943774).

Almost surely, 2^3989887547 is an apocalyptic number.

3989887547 is a deficient number, since it is larger than the sum of its proper divisors (1).

3989887547 is an equidigital number, since it uses as much as digits as its factorization.

3989887547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 68.

The square root of 3989887547 is about 63165.5566507571. The cubic root of 3989887547 is about 1586.0622132107.

The spelling of 3989887547 in words is "three billion, nine hundred eighty-nine million, eight hundred eighty-seven thousand, five hundred forty-seven".