4006021613 has 4 divisors (see below), whose sum is σ = 4370205408. Its totient is φ = 3641837820.

The previous prime is 4006021597. The next prime is 4006021667. The reversal of 4006021613 is 3161206004.

It is a happy number.

4006021613 is digitally balanced in base 3, 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4006021613 - 2⁴ = 4006021597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182091881 + ... + 182091902.

It is an arithmetic number, because the mean of its divisors is an integer number (1092551352).

Almost surely, 2^4006021613 is an apocalyptic number.

It is an amenable number.

4006021613 is a deficient number, since it is larger than the sum of its proper divisors (364183795).

4006021613 is a wasteful number, since it uses less digits than its factorization.

4006021613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364183794.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 4006021613 is about 63293.1403313187. The cubic root of 4006021613 is about 1588.1972121553.

Adding to 4006021613 its reverse (3161206004), we get a palindrome (7167227617).

The spelling of 4006021613 in words is "four billion, six million, twenty-one thousand, six hundred thirteen".