3919663857 has 8 divisors (see below), whose sum is σ = 5367467776. Its totient is φ = 2542484592.

The previous prime is 3919663849. The next prime is 3919663877. The reversal of 3919663857 is 7583669193.

It is a happy number.

3919663857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3919663857 - 2³ = 3919663849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3919663797 and 3919663806.

It is not an unprimeable number, because it can be changed into a prime (3919663807) 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, 17656033 + ... + 17656254.

It is an arithmetic number, because the mean of its divisors is an integer number (670933472).

Almost surely, 2^3919663857 is an apocalyptic number.

3919663857 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

3919663857 is a deficient number, since it is larger than the sum of its proper divisors (1447803919).

3919663857 is a wasteful number, since it uses less digits than its factorization.

3919663857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35312327.

The product of its digits is 7348320, while the sum is 57.

The square root of 3919663857 is about 62607.2188888789. The cubic root of 3919663857 is about 1576.7019622445.

The spelling of 3919663857 in words is "three billion, nine hundred nineteen million, six hundred sixty-three thousand, eight hundred fifty-seven".