4988991 has 8 divisors (see below), whose sum is σ = 7602304. Its totient is φ = 2850840.

The previous prime is 4988987. The next prime is 4988993. The reversal of 4988991 is 1998894.

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

It is not a de Polignac number, because 4988991 - 2² = 4988987 is a prime.

It is a Duffinian number.

4988991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4988991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4988993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118765 + ... + 118806.

It is an arithmetic number, because the mean of its divisors is an integer number (950288).

Almost surely, 2^4988991 is an apocalyptic number.

4988991 is a deficient number, since it is larger than the sum of its proper divisors (2613313).

4988991 is a wasteful number, since it uses less digits than its factorization.

4988991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237581.

The product of its digits is 186624, while the sum is 48.

The square root of 4988991 is about 2233.6049337338. The cubic root of 4988991 is about 170.8720016109.

The spelling of 4988991 in words is "four million, nine hundred eighty-eight thousand, nine hundred ninety-one".