3923208857 has 4 divisors (see below), whose sum is σ = 3951845556. Its totient is φ = 3894572160.

The previous prime is 3923208833. The next prime is 3923208899. The reversal of 3923208857 is 7588023293.

3923208857 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2360113561 + 1563095296 = 48581^2 + 39536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3923208857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3923205857) 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, 14318144 + ... + 14318417.

It is an arithmetic number, because the mean of its divisors is an integer number (987961389).

Almost surely, 2^3923208857 is an apocalyptic number.

It is an amenable number.

3923208857 is a deficient number, since it is larger than the sum of its proper divisors (28636699).

3923208857 is a wasteful number, since it uses less digits than its factorization.

3923208857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28636698.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 3923208857 is about 62635.5239221322. The cubic root of 3923208857 is about 1577.1771496125.

The spelling of 3923208857 in words is "three billion, nine hundred twenty-three million, two hundred eight thousand, eight hundred fifty-seven".