3949785541 has 8 divisors (see below), whose sum is σ = 4317102944. Its totient is φ = 3591537840.

The previous prime is 3949785443. The next prime is 3949785551. The reversal of 3949785541 is 1455879493.

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 3949785541 - 2¹¹ = 3949783493 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 (3949785551) 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 7 ways as a sum of consecutive naturals, for example, 2266515 + ... + 2268256.

It is an arithmetic number, because the mean of its divisors is an integer number (539637868).

Almost surely, 2^3949785541 is an apocalyptic number.

It is an amenable number.

3949785541 is a deficient number, since it is larger than the sum of its proper divisors (367317403).

3949785541 is a wasteful number, since it uses less digits than its factorization.

3949785541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534851.

The product of its digits is 5443200, while the sum is 55.

The square root of 3949785541 is about 62847.3192825279. The cubic root of 3949785541 is about 1580.7305200907.

The spelling of 3949785541 in words is "three billion, nine hundred forty-nine million, seven hundred eighty-five thousand, five hundred forty-one".