4004000643 has 4 divisors (see below), whose sum is σ = 5338667528. Its totient is φ = 2669333760.

The previous prime is 4004000617. The next prime is 4004000647. The reversal of 4004000643 is 3460004004.

4004000643 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 4004000643 - 2¹² = 4003996547 is a prime.

It is a super-2 number, since 2×4004000643² = 32064042298288826898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4004000647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667333438 + ... + 667333443.

It is an arithmetic number, because the mean of its divisors is an integer number (1334666882).

Almost surely, 2^4004000643 is an apocalyptic number.

4004000643 is a deficient number, since it is larger than the sum of its proper divisors (1334666885).

4004000643 is a wasteful number, since it uses less digits than its factorization.

4004000643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334666884.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 4004000643 is about 63277.1731590469. The cubic root of 4004000643 is about 1587.9300943738.

Adding to 4004000643 its reverse (3460004004), we get a palindrome (7464004647).

The spelling of 4004000643 in words is "four billion, four million, six hundred forty-three", and thus it is an aban number.