4198987 has 4 divisors (see below), whose sum is σ = 4522000. Its totient is φ = 3875976.

The previous prime is 4198973. The next prime is 4199003. The reversal of 4198987 is 7898914.

It is a happy number.

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

It is not a de Polignac number, because 4198987 - 2¹¹ = 4196939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4198927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161487 + ... + 161512.

It is an arithmetic number, because the mean of its divisors is an integer number (1130500).

Almost surely, 2^4198987 is an apocalyptic number.

4198987 is a deficient number, since it is larger than the sum of its proper divisors (323013).

4198987 is a wasteful number, since it uses less digits than its factorization.

4198987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323012.

The product of its digits is 145152, while the sum is 46.

The square root of 4198987 is about 2049.1429915943. The cubic root of 4198987 is about 161.3298921053.

The spelling of 4198987 in words is "four million, one hundred ninety-eight thousand, nine hundred eighty-seven".