4013999 has 4 divisors (see below), whose sum is σ = 4378920. Its totient is φ = 3649080.

The previous prime is 4013993. The next prime is 4014001. The reversal of 4013999 is 9993104.

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 4013999 - 2¹⁶ = 3948463 is a prime.

It is a super-2 number, since 2×4013999² = 32224375944002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4013993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182444 + ... + 182465.

It is an arithmetic number, because the mean of its divisors is an integer number (1094730).

Almost surely, 2^4013999 is an apocalyptic number.

4013999 is a deficient number, since it is larger than the sum of its proper divisors (364921).

4013999 is a wasteful number, since it uses less digits than its factorization.

4013999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364920.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 4013999 is about 2003.4966932840. The cubic root of 4013999 is about 158.9250731449.

The spelling of 4013999 in words is "four million, thirteen thousand, nine hundred ninety-nine".