4887547921 has 3 divisors (see below), whose sum is σ = 4887617833. Its totient is φ = 4887478010.

The previous prime is 4887547919. The next prime is 4887547927. The reversal of 4887547921 is 1297457884.

The square root of 4887547921 is 69911.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4887547921 - 2¹ = 4887547919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4887547927) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 34956 + ... + 104866.

Almost surely, 2^4887547921 is an apocalyptic number.

4887547921 is the 69911-st square number.

4887547921 is the 34956-th centered octagonal number.

It is an amenable number.

4887547921 is a deficient number, since it is larger than the sum of its proper divisors (69912).

4887547921 is an frugal number, since it uses more digits than its factorization.

4887547921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139822 (or 69911 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 55.

The cubic root of 4887547921 is about 1697.0592666756.

The spelling of 4887547921 in words is "four billion, eight hundred eighty-seven million, five hundred forty-seven thousand, nine hundred twenty-one".