4721791 has 2 divisors, whose sum is σ = 4721792. Its totient is φ = 4721790.

The previous prime is 4721779. The next prime is 4721813. The reversal of 4721791 is 1971274.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4721791 - 2⁷ = 4721663 is a prime.

It is a Chen prime.

It is an Ulam number.

4721791 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4721741) 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 as a sum of consecutive naturals, namely, 2360895 + 2360896.

It is an arithmetic number, because the mean of its divisors is an integer number (2360896).

Almost surely, 2^4721791 is an apocalyptic number.

4721791 is a deficient number, since it is larger than the sum of its proper divisors (1).

4721791 is an equidigital number, since it uses as much as digits as its factorization.

4721791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 31.

The square root of 4721791 is about 2172.9682464316. The cubic root of 4721791 is about 167.7653446369.

The spelling of 4721791 in words is "four million, seven hundred twenty-one thousand, seven hundred ninety-one".