4911987 has 8 divisors (see below), whose sum is σ = 6673104. Its totient is φ = 3212768.

The previous prime is 4911961. The next prime is 4912007. The reversal of 4911987 is 7891194.

It is a happy number.

4911987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4911987 - 2⁷ = 4911859 is a prime.

4911987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4911887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15288 + ... + 15605.

It is an arithmetic number, because the mean of its divisors is an integer number (834138).

Almost surely, 2^4911987 is an apocalyptic number.

4911987 is a deficient number, since it is larger than the sum of its proper divisors (1761117).

4911987 is a wasteful number, since it uses less digits than its factorization.

4911987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30949.

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

The square root of 4911987 is about 2216.3002955376. The cubic root of 4911987 is about 169.9883152292.

The spelling of 4911987 in words is "four million, nine hundred eleven thousand, nine hundred eighty-seven".