3999371 has 4 divisors (see below), whose sum is σ = 4084512. Its totient is φ = 3914232.

The previous prime is 3999337. The next prime is 3999379. The reversal of 3999371 is 1739993.

3999371 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 1739993 = 421 ⋅4133.

It is a cyclic number.

It is not a de Polignac number, because 3999371 - 2¹⁴ = 3982987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3999379) 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 in 3 ways as a sum of consecutive naturals, for example, 42500 + ... + 42593.

It is an arithmetic number, because the mean of its divisors is an integer number (1021128).

Almost surely, 2^3999371 is an apocalyptic number.

3999371 is a deficient number, since it is larger than the sum of its proper divisors (85141).

3999371 is an equidigital number, since it uses as much as digits as its factorization.

3999371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85140.

The product of its digits is 45927, while the sum is 41.

The square root of 3999371 is about 1999.8427438176. The cubic root of 3999371 is about 158.7317841335.

The spelling of 3999371 in words is "three million, nine hundred ninety-nine thousand, three hundred seventy-one".