3999923 has 2 divisors, whose sum is σ = 3999924. Its totient is φ = 3999922.

The previous prime is 3999917. The next prime is 3999929. The reversal of 3999923 is 3299993.

3999923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (3999917) and next prime (3999929).

It is a cyclic number.

It is not a de Polignac number, because 3999923 - 2⁶ = 3999859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (3999929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999961 + 1999962.

It is an arithmetic number, because the mean of its divisors is an integer number (1999962).

Almost surely, 2^3999923 is an apocalyptic number.

3999923 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999923 is an equidigital number, since it uses as much as digits as its factorization.

3999923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118098, while the sum is 44.

The square root of 3999923 is about 1999.9807499074. The cubic root of 3999923 is about 158.7390866079.

The spelling of 3999923 in words is "three million, nine hundred ninety-nine thousand, nine hundred twenty-three".