4987643 has 4 divisors (see below), whose sum is σ = 5039160. Its totient is φ = 4936128.

The previous prime is 4987639. The next prime is 4987657. The reversal of 4987643 is 3467894.

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 4987643 - 2² = 4987639 is a prime.

It is a d-powerful number, because it can be written as 4² + 9⁴ + 8⁵ + 7⁶ + 6⁶ + 4⁵ + 3¹⁴ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4987643.

It is not an unprimeable number, because it can be changed into a prime (4987663) 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, 25613 + ... + 25806.

It is an arithmetic number, because the mean of its divisors is an integer number (1259790).

Almost surely, 2^4987643 is an apocalyptic number.

4987643 is a deficient number, since it is larger than the sum of its proper divisors (51517).

4987643 is an equidigital number, since it uses as much as digits as its factorization.

4987643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51516.

The product of its digits is 145152, while the sum is 41.

The square root of 4987643 is about 2233.3031590001. The cubic root of 4987643 is about 170.8566106427.

The spelling of 4987643 in words is "four million, nine hundred eighty-seven thousand, six hundred forty-three".