3998767 has 4 divisors (see below), whose sum is σ = 4019680. Its totient is φ = 3977856.

The previous prime is 3998749. The next prime is 3998773. The reversal of 3998767 is 7678993.

3998767 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: 7678993 = 7 ⋅1096999.

It is a cyclic number.

It is not a de Polignac number, because 3998767 - 2⁷ = 3998639 is a prime.

It is a Duffinian number.

3998767 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3998767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998707) 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, 10167 + ... + 10552.

It is an arithmetic number, because the mean of its divisors is an integer number (1004920).

Almost surely, 2^3998767 is an apocalyptic number.

3998767 is a deficient number, since it is larger than the sum of its proper divisors (20913).

3998767 is a wasteful number, since it uses less digits than its factorization.

3998767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20912.

The product of its digits is 571536, while the sum is 49.

The square root of 3998767 is about 1999.6917262418. The cubic root of 3998767 is about 158.7237929748.

The spelling of 3998767 in words is "three million, nine hundred ninety-eight thousand, seven hundred sixty-seven".