4927721 has 2 divisors, whose sum is σ = 4927722. Its totient is φ = 4927720.

The previous prime is 4927711. The next prime is 4927723. The reversal of 4927721 is 1277294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4044121 + 883600 = 2011^2 + 940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4927721 is a prime.

Together with 4927723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4927723) 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, 2463860 + 2463861.

It is an arithmetic number, because the mean of its divisors is an integer number (2463861).

Almost surely, 2^4927721 is an apocalyptic number.

It is an amenable number.

4927721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4927721 is an equidigital number, since it uses as much as digits as its factorization.

4927721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 32.

The square root of 4927721 is about 2219.8470668044. The cubic root of 4927721 is about 170.1696230842.

The spelling of 4927721 in words is "four million, nine hundred twenty-seven thousand, seven hundred twenty-one".