4011999 has 4 divisors (see below), whose sum is σ = 5349336. Its totient is φ = 2674664.

The previous prime is 4011991. The next prime is 4012013. The reversal of 4011999 is 9991104.

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 4011999 - 2³ = 4011991 is a prime.

It is a super-2 number, since 2×4011999² = 32192271952002, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4011991) 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, 668664 + ... + 668669.

It is an arithmetic number, because the mean of its divisors is an integer number (1337334).

Almost surely, 2^4011999 is an apocalyptic number.

4011999 is a deficient number, since it is larger than the sum of its proper divisors (1337337).

4011999 is a wasteful number, since it uses less digits than its factorization.

4011999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337336.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 4011999 is about 2002.9975037428. The cubic root of 4011999 is about 158.8986736240.

The spelling of 4011999 in words is "four million, eleven thousand, nine hundred ninety-nine".