3919889549 has 8 divisors (see below), whose sum is σ = 3937012992. Its totient is φ = 3902783440.

The previous prime is 3919889543. The next prime is 3919889569. The reversal of 3919889549 is 9459889193.

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 3919889549 - 2⁸ = 3919889293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3919889543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665879 + ... + 671739.

It is an arithmetic number, because the mean of its divisors is an integer number (492126624).

Almost surely, 2^3919889549 is an apocalyptic number.

It is an amenable number.

3919889549 is a deficient number, since it is larger than the sum of its proper divisors (17123443).

3919889549 is a wasteful number, since it uses less digits than its factorization.

3919889549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8667.

The product of its digits is 25194240, while the sum is 65.

The square root of 3919889549 is about 62609.0213068372. The cubic root of 3919889549 is about 1576.7322235290.

The spelling of 3919889549 in words is "three billion, nine hundred nineteen million, eight hundred eighty-nine thousand, five hundred forty-nine".