4987989 has 12 divisors (see below), whose sum is σ = 7341516. Its totient is φ = 3262272.

The previous prime is 4987979. The next prime is 4987999. The reversal of 4987989 is 9897894.

4987989 is a `hidden beast` number, since 498 + 79 + 89 = 666.

It is an interprime number because it is at equal distance from previous prime (4987979) and next prime (4987999).

It can be written as a sum of positive squares in 2 ways, for example, as 4100625 + 887364 = 2025^2 + 942^2 .

It is not a de Polignac number, because 4987989 - 2⁴ = 4987973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4987979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4752 + ... + 5705.

It is an arithmetic number, because the mean of its divisors is an integer number (611793).

Almost surely, 2^4987989 is an apocalyptic number.

It is an amenable number.

4987989 is a deficient number, since it is larger than the sum of its proper divisors (2353527).

4987989 is a wasteful number, since it uses less digits than its factorization.

4987989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10516 (or 10513 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 4987989 is about 2233.3806213899. The cubic root of 4987989 is about 170.8605614080.

The spelling of 4987989 in words is "four million, nine hundred eighty-seven thousand, nine hundred eighty-nine".