4890978987 has 4 divisors (see below), whose sum is σ = 6521305320. Its totient is φ = 3260652656.

The previous prime is 4890978979. The next prime is 4890979043. The reversal of 4890978987 is 7898790984.

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 4890978987 - 2³ = 4890978979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4890978947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815163162 + ... + 815163167.

It is an arithmetic number, because the mean of its divisors is an integer number (1630326330).

Almost surely, 2^4890978987 is an apocalyptic number.

4890978987 is a deficient number, since it is larger than the sum of its proper divisors (1630326333).

4890978987 is a wasteful number, since it uses less digits than its factorization.

4890978987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630326332.

The product of its (nonzero) digits is 73156608, while the sum is 69.

The square root of 4890978987 is about 69935.5345085744. The cubic root of 4890978987 is about 1697.4562865074.

The spelling of 4890978987 in words is "four billion, eight hundred ninety million, nine hundred seventy-eight thousand, nine hundred eighty-seven".