4991885 has 4 divisors (see below), whose sum is σ = 5990268. Its totient is φ = 3993504.

The previous prime is 4991881. The next prime is 4991893. The reversal of 4991885 is 5881994.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2390116 + 2601769 = 1546^2 + 1613^2 .

It is a cyclic number.

It is not a de Polignac number, because 4991885 - 2² = 4991881 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 (4991881) 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, 499184 + ... + 499193.

It is an arithmetic number, because the mean of its divisors is an integer number (1497567).

Almost surely, 2^4991885 is an apocalyptic number.

It is an amenable number.

4991885 is a deficient number, since it is larger than the sum of its proper divisors (998383).

4991885 is an equidigital number, since it uses as much as digits as its factorization.

4991885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998382.

The product of its digits is 103680, while the sum is 44.

The square root of 4991885 is about 2234.2526714765. The cubic root of 4991885 is about 170.9050348760.

The spelling of 4991885 in words is "four million, nine hundred ninety-one thousand, eight hundred eighty-five".