3999895 has 4 divisors (see below), whose sum is σ = 4799880. Its totient is φ = 3199912.

The previous prime is 3999893. The next prime is 3999901. The reversal of 3999895 is 5989993.

3999895 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.

It is a cyclic number.

It is not a de Polignac number, because 3999895 - 2¹ = 3999893 is a prime.

It is a super-2 number, since 2×3999895² = 31998320022050, which contains 22 as substring.

3999895 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999893) 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, 399985 + ... + 399994.

It is an arithmetic number, because the mean of its divisors is an integer number (1199970).

Almost surely, 2^3999895 is an apocalyptic number.

3999895 is a deficient number, since it is larger than the sum of its proper divisors (799985).

3999895 is an equidigital number, since it uses as much as digits as its factorization.

3999895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799984.

The product of its digits is 787320, while the sum is 52.

The square root of 3999895 is about 1999.9737498277. The cubic root of 3999895 is about 158.7387162087.

The spelling of 3999895 in words is "three million, nine hundred ninety-nine thousand, eight hundred ninety-five".