3923861 has 4 divisors (see below), whose sum is σ = 4130400. Its totient is φ = 3717324.

The previous prime is 3923839. The next prime is 3923863. The reversal of 3923861 is 1683293.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3923861 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 (3923863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103241 + ... + 103278.

It is an arithmetic number, because the mean of its divisors is an integer number (1032600).

Almost surely, 2^3923861 is an apocalyptic number.

It is an amenable number.

3923861 is a deficient number, since it is larger than the sum of its proper divisors (206539).

3923861 is a wasteful number, since it uses less digits than its factorization.

3923861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206538.

The product of its digits is 7776, while the sum is 32.

The square root of 3923861 is about 1980.8737970906. The cubic root of 3923861 is about 157.7264534548.

The spelling of 3923861 in words is "three million, nine hundred twenty-three thousand, eight hundred sixty-one".