4000791 has 4 divisors (see below), whose sum is σ = 5334392. Its totient is φ = 2667192.

The previous prime is 4000751. The next prime is 4000813. The reversal of 4000791 is 1970004.

4000791 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 not a de Polignac number, because 4000791 - 2¹⁵ = 3968023 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000741) 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, 666796 + ... + 666801.

It is an arithmetic number, because the mean of its divisors is an integer number (1333598).

Almost surely, 2^4000791 is an apocalyptic number.

4000791 is a deficient number, since it is larger than the sum of its proper divisors (1333601).

4000791 is a wasteful number, since it uses less digits than its factorization.

4000791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333600.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 4000791 is about 2000.1977402247. The cubic root of 4000791 is about 158.7505681258.

Adding to 4000791 its reverse (1970004), we get a palindrome (5970795).

The spelling of 4000791 in words is "four million, seven hundred ninety-one", and thus it is an aban number.