3857847913 has 4 divisors (see below), whose sum is σ = 4060892560. Its totient is φ = 3654803268.

The previous prime is 3857847907. The next prime is 3857847923. The reversal of 3857847913 is 3197487583.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3197487583 = 307 ⋅10415269.

It is a cyclic number.

It is not a de Polignac number, because 3857847913 - 2⁹ = 3857847401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3857847923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101522295 + ... + 101522332.

It is an arithmetic number, because the mean of its divisors is an integer number (1015223140).

Almost surely, 2^3857847913 is an apocalyptic number.

It is an amenable number.

3857847913 is a deficient number, since it is larger than the sum of its proper divisors (203044647).

3857847913 is a wasteful number, since it uses less digits than its factorization.

3857847913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203044646.

The product of its digits is 5080320, while the sum is 55.

The square root of 3857847913 is about 62111.5763203608. The cubic root of 3857847913 is about 1568.3694260107.

The spelling of 3857847913 in words is "three billion, eight hundred fifty-seven million, eight hundred forty-seven thousand, nine hundred thirteen".