4005001399 has 4 divisors (see below), whose sum is σ = 4577144464. Its totient is φ = 3432858336.

The previous prime is 4005001387. The next prime is 4005001417. The reversal of 4005001399 is 9931005004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4005001399 - 2⁵ = 4005001367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4005001399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005001309) 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, 286071522 + ... + 286071535.

It is an arithmetic number, because the mean of its divisors is an integer number (1144286116).

Almost surely, 2^4005001399 is an apocalyptic number.

4005001399 is a deficient number, since it is larger than the sum of its proper divisors (572143065).

4005001399 is an equidigital number, since it uses as much as digits as its factorization.

4005001399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572143064.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 4005001399 is about 63285.0803823460. The cubic root of 4005001399 is about 1588.0623785844.

The spelling of 4005001399 in words is "four billion, five million, one thousand, three hundred ninety-nine".