3999929 has 2 divisors, whose sum is σ = 3999930. Its totient is φ = 3999928.

The previous prime is 3999923. The next prime is 3999949. The reversal of 3999929 is 9299993.

3999929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3429904 + 570025 = 1852^2 + 755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3999929 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3999923) 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, 1999964 + 1999965.

It is an arithmetic number, because the mean of its divisors is an integer number (1999965).

Almost surely, 2^3999929 is an apocalyptic number.

It is an amenable number.

3999929 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999929 is an equidigital number, since it uses as much as digits as its factorization.

3999929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 354294, while the sum is 50.

The square root of 3999929 is about 1999.9822499212. The cubic root of 3999929 is about 158.7391659790.

The spelling of 3999929 in words is "three million, nine hundred ninety-nine thousand, nine hundred twenty-nine".