4989391 has 8 divisors (see below), whose sum is σ = 5461200. Its totient is φ = 4520640.

The previous prime is 4989377. The next prime is 4989409. The reversal of 4989391 is 1939894.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4989391 - 2⁵ = 4989359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4989301) 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 7 ways as a sum of consecutive naturals, for example, 3945 + ... + 5053.

It is an arithmetic number, because the mean of its divisors is an integer number (682650).

Almost surely, 2^4989391 is an apocalyptic number.

4989391 is a deficient number, since it is larger than the sum of its proper divisors (471809).

4989391 is a wasteful number, since it uses less digits than its factorization.

4989391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529.

The product of its digits is 69984, while the sum is 43.

The square root of 4989391 is about 2233.6944732886. The cubic root of 4989391 is about 170.8765681304.

It can be divided in two parts, 498 and 9391, that added together give a palindrome (9889).

The spelling of 4989391 in words is "four million, nine hundred eighty-nine thousand, three hundred ninety-one".