4987191 has 16 divisors (see below), whose sum is σ = 7349760. Its totient is φ = 2982720.

The previous prime is 4987127. The next prime is 4987207. The reversal of 4987191 is 1917894.

It is a happy number.

It is not a de Polignac number, because 4987191 - 2⁶ = 4987127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4987091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1651 + ... + 3563.

It is an arithmetic number, because the mean of its divisors is an integer number (459360).

Almost surely, 2^4987191 is an apocalyptic number.

4987191 is a deficient number, since it is larger than the sum of its proper divisors (2362569).

4987191 is a wasteful number, since it uses less digits than its factorization.

4987191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006.

The product of its digits is 18144, while the sum is 39.

The square root of 4987191 is about 2233.2019613103. The cubic root of 4987191 is about 170.8514492521.

The spelling of 4987191 in words is "four million, nine hundred eighty-seven thousand, one hundred ninety-one".