4991743 has 4 divisors (see below), whose sum is σ = 5047920. Its totient is φ = 4935568.

The previous prime is 4991719. The next prime is 4991771. The reversal of 4991743 is 3471994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3471994 = 2 ⋅1735997.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4991743 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991143) 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, 27955 + ... + 28132.

It is an arithmetic number, because the mean of its divisors is an integer number (1261980).

Almost surely, 2^4991743 is an apocalyptic number.

4991743 is a deficient number, since it is larger than the sum of its proper divisors (56177).

4991743 is an equidigital number, since it uses as much as digits as its factorization.

4991743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56176.

The product of its digits is 27216, while the sum is 37.

The square root of 4991743 is about 2234.2208932870. The cubic root of 4991743 is about 170.9034143295.

The spelling of 4991743 in words is "four million, nine hundred ninety-one thousand, seven hundred forty-three".