4797721 has 2 divisors, whose sum is σ = 4797722. Its totient is φ = 4797720.

The previous prime is 4797707. The next prime is 4797733. The reversal of 4797721 is 1277974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4562496 + 235225 = 2136^2 + 485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4797721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4797701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2398860 + 2398861.

It is an arithmetic number, because the mean of its divisors is an integer number (2398861).

Almost surely, 2^4797721 is an apocalyptic number.

It is an amenable number.

4797721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4797721 is an equidigital number, since it uses as much as digits as its factorization.

4797721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 37.

The square root of 4797721 is about 2190.3700600583. The cubic root of 4797721 is about 168.6598318473.

The spelling of 4797721 in words is "four million, seven hundred ninety-seven thousand, seven hundred twenty-one".