3989427169 has 72 divisors (see below), whose sum is σ = 5451808320. Its totient is φ = 2893877280.

The previous prime is 3989427161. The next prime is 3989427193. The reversal of 3989427169 is 9617249893.

It is not a de Polignac number, because 3989427169 - 2³ = 3989427161 is a prime.

It is a super-2 number, since 2×3989427169² = 31831058273510709122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3989427161) 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 in 71 ways as a sum of consecutive naturals, for example, 128691184 + ... + 128691214.

It is an arithmetic number, because the mean of its divisors is an integer number (75719560).

Almost surely, 2^3989427169 is an apocalyptic number.

It is an amenable number.

3989427169 is a deficient number, since it is larger than the sum of its proper divisors (1462381151).

3989427169 is an frugal number, since it uses more digits than its factorization.

3989427169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 70 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 58.

The square root of 3989427169 is about 63161.9123285545. The cubic root of 3989427169 is about 1586.0012076287.

The spelling of 3989427169 in words is "three billion, nine hundred eighty-nine million, four hundred twenty-seven thousand, one hundred sixty-nine".