4887989 has 2 divisors, whose sum is σ = 4887990. Its totient is φ = 4887988.

The previous prime is 4887977. The next prime is 4888043. The reversal of 4887989 is 9897884.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4765489 + 122500 = 2183^2 + 350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4887989 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4887989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4887919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2443994 + 2443995.

It is an arithmetic number, because the mean of its divisors is an integer number (2443995).

Almost surely, 2^4887989 is an apocalyptic number.

It is an amenable number.

4887989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4887989 is an equidigital number, since it uses as much as digits as its factorization.

4887989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 53.

The square root of 4887989 is about 2210.8796891735. The cubic root of 4887989 is about 169.7110315770.

The spelling of 4887989 in words is "four million, eight hundred eighty-seven thousand, nine hundred eighty-nine".