3989549951 has 8 divisors (see below), whose sum is σ = 4005119184. Its totient is φ = 3974002560.

The previous prime is 3989549917. The next prime is 3989549983. The reversal of 3989549951 is 1599459893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3989549951 - 2⁶ = 3989549887 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 (3989549251) 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 7 ways as a sum of consecutive naturals, for example, 424661 + ... + 433953.

It is an arithmetic number, because the mean of its divisors is an integer number (500639898).

Almost surely, 2^3989549951 is an apocalyptic number.

3989549951 is a deficient number, since it is larger than the sum of its proper divisors (15569233).

3989549951 is a wasteful number, since it uses less digits than its factorization.

3989549951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10921.

The product of its digits is 15746400, while the sum is 62.

The square root of 3989549951 is about 63162.8842834144. The cubic root of 3989549951 is about 1586.0174781686.

The spelling of 3989549951 in words is "three billion, nine hundred eighty-nine million, five hundred forty-nine thousand, nine hundred fifty-one".