4991263 has 8 divisors (see below), whose sum is σ = 5155232. Its totient is φ = 4828896.

The previous prime is 4991257. The next prime is 4991267. The reversal of 4991263 is 3621994.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4991263 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 (4991267) 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, 10006 + ... + 10492.

It is an arithmetic number, because the mean of its divisors is an integer number (644404).

Almost surely, 2^4991263 is an apocalyptic number.

4991263 is a deficient number, since it is larger than the sum of its proper divisors (163969).

4991263 is a wasteful number, since it uses less digits than its factorization.

4991263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801.

The product of its digits is 11664, while the sum is 34.

The square root of 4991263 is about 2234.1134707082. The cubic root of 4991263 is about 170.8979361984.

The spelling of 4991263 in words is "four million, nine hundred ninety-one thousand, two hundred sixty-three".