4987789 has 4 divisors (see below), whose sum is σ = 5017824. Its totient is φ = 4957756.

The previous prime is 4987771. The next prime is 4987793. The reversal of 4987789 is 9877894.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4987789 - 2¹¹ = 4985741 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4987729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14767 + ... + 15100.

It is an arithmetic number, because the mean of its divisors is an integer number (1254456).

Almost surely, 2^4987789 is an apocalyptic number.

It is an amenable number.

4987789 is a deficient number, since it is larger than the sum of its proper divisors (30035).

4987789 is a wasteful number, since it uses less digits than its factorization.

4987789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30034.

The product of its digits is 1016064, while the sum is 52.

The square root of 4987789 is about 2233.3358457697. The cubic root of 4987789 is about 170.8582777509.

It can be divided in two parts, 4987 and 789, that added together give a square (5776 = 76²).

The spelling of 4987789 in words is "four million, nine hundred eighty-seven thousand, seven hundred eighty-nine".