4183987 has 4 divisors (see below), whose sum is σ = 4273056. Its totient is φ = 4094920.

The previous prime is 4183973. The next prime is 4184017. The reversal of 4183987 is 7893814.

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 4183987 - 2¹⁵ = 4151219 is a prime.

It is a super-3 number, since 3×4183987³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

4183987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4183937) 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, 44464 + ... + 44557.

It is an arithmetic number, because the mean of its divisors is an integer number (1068264).

Almost surely, 2^4183987 is an apocalyptic number.

4183987 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

4183987 is a deficient number, since it is larger than the sum of its proper divisors (89069).

4183987 is an equidigital number, since it uses as much as digits as its factorization.

4183987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89068.

The product of its digits is 48384, while the sum is 40.

The square root of 4183987 is about 2045.4796503510. The cubic root of 4183987 is about 161.1375571684.

The spelling of 4183987 in words is "four million, one hundred eighty-three thousand, nine hundred eighty-seven".