4938991 has 4 divisors (see below), whose sum is σ = 4955184. Its totient is φ = 4922800.

The previous prime is 4938979. The next prime is 4939003. The reversal of 4938991 is 1998394.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4938979) and next prime (4939003).

It is a cyclic number.

It is not a de Polignac number, because 4938991 - 2¹⁹ = 4414703 is a prime.

It is a Duffinian number.

4938991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4938931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7630 + ... + 8251.

It is an arithmetic number, because the mean of its divisors is an integer number (1238796).

Almost surely, 2^4938991 is an apocalyptic number.

4938991 is a deficient number, since it is larger than the sum of its proper divisors (16193).

4938991 is a wasteful number, since it uses less digits than its factorization.

4938991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16192.

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

The square root of 4938991 is about 2222.3840802166. The cubic root of 4938991 is about 170.2992537632.

It can be divided in two parts, 4938 and 991, that added together give a square (5929 = 77²).

The spelling of 4938991 in words is "four million, nine hundred thirty-eight thousand, nine hundred ninety-one".