4000187 has 4 divisors (see below), whose sum is σ = 4016376. Its totient is φ = 3984000.

The previous prime is 4000169. The next prime is 4000189. The reversal of 4000187 is 7810004.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4000187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4000189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7718 + ... + 8219.

It is an arithmetic number, because the mean of its divisors is an integer number (1004094).

Almost surely, 2^4000187 is an apocalyptic number.

4000187 is a deficient number, since it is larger than the sum of its proper divisors (16189).

4000187 is a wasteful number, since it uses less digits than its factorization.

4000187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16188.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 4000187 is about 2000.0467494536. The cubic root of 4000187 is about 158.7425788582.

The spelling of 4000187 in words is "four million, one hundred eighty-seven", and thus it is an aban number.