4991873 has 8 divisors (see below), whose sum is σ = 5165160. Its totient is φ = 4821120.

The previous prime is 4991867. The next prime is 4991879. The reversal of 4991873 is 3781994.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4991867) and next prime (4991879).

It can be written as a sum of positive squares in 4 ways, for example, as 27889 + 4963984 = 167^2 + 2228^2 .

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 4991873 - 2⁸ = 4991617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4991873.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991879) 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, 3911 + ... + 5027.

It is an arithmetic number, because the mean of its divisors is an integer number (645645).

Almost surely, 2^4991873 is an apocalyptic number.

It is an amenable number.

4991873 is a deficient number, since it is larger than the sum of its proper divisors (173287).

4991873 is a wasteful number, since it uses less digits than its factorization.

4991873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267.

The product of its digits is 54432, while the sum is 41.

The square root of 4991873 is about 2234.2499860132. The cubic root of 4991873 is about 170.9048979296.

The spelling of 4991873 in words is "four million, nine hundred ninety-one thousand, eight hundred seventy-three".