3899947741 has 4 divisors (see below), whose sum is σ = 4005351772. Its totient is φ = 3794543712.

The previous prime is 3899947739. The next prime is 3899947763. The reversal of 3899947741 is 1477499983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1477499983 = 19 ⋅77763157.

It can be written as a sum of positive squares in 2 ways, for example, as 3341996100 + 557951641 = 57810^2 + 23621^2 .

It is a cyclic number.

It is not a de Polignac number, because 3899947741 - 2¹ = 3899947739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3899947741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899947841) 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 3 ways as a sum of consecutive naturals, for example, 52701960 + ... + 52702033.

It is an arithmetic number, because the mean of its divisors is an integer number (1001337943).

Almost surely, 2^3899947741 is an apocalyptic number.

It is an amenable number.

3899947741 is a deficient number, since it is larger than the sum of its proper divisors (105404031).

3899947741 is a wasteful number, since it uses less digits than its factorization.

3899947741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105404030.

The product of its digits is 13716864, while the sum is 61.

The square root of 3899947741 is about 62449.5615757229. The cubic root of 3899947741 is about 1574.0538859291.

The spelling of 3899947741 in words is "three billion, eight hundred ninety-nine million, nine hundred forty-seven thousand, seven hundred forty-one".