3899967 has 4 divisors (see below), whose sum is σ = 5199960. Its totient is φ = 2599976.

The previous prime is 3899963. The next prime is 3899977. The reversal of 3899967 is 7699983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7699983 = 3 ⋅2566661.

It is a cyclic number.

It is not a de Polignac number, because 3899967 - 2² = 3899963 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649992 + ... + 649997.

It is an arithmetic number, because the mean of its divisors is an integer number (1299990).

Almost surely, 2^3899967 is an apocalyptic number.

3899967 is a deficient number, since it is larger than the sum of its proper divisors (1299993).

3899967 is a wasteful number, since it uses less digits than its factorization.

3899967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299992.

The product of its digits is 734832, while the sum is 51.

The square root of 3899967 is about 1974.8334106957. The cubic root of 3899967 is about 157.4056476960.

The spelling of 3899967 in words is "three million, eight hundred ninety-nine thousand, nine hundred sixty-seven".