4749420721 has 2 divisors, whose sum is σ = 4749420722. Its totient is φ = 4749420720.

The previous prime is 4749420701. The next prime is 4749420737. The reversal of 4749420721 is 1270249474.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4443555600 + 305865121 = 66660^2 + 17489^2 .

It is a cyclic number.

It is not a de Polignac number, because 4749420721 - 2⁷ = 4749420593 is a prime.

It is not a weakly prime, because it can be changed into another prime (4749420701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2374710360 + 2374710361.

It is an arithmetic number, because the mean of its divisors is an integer number (2374710361).

Almost surely, 2^4749420721 is an apocalyptic number.

It is an amenable number.

4749420721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4749420721 is an equidigital number, since it uses as much as digits as its factorization.

4749420721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 4749420721 is about 68916.0411007481. The cubic root of 4749420721 is about 1680.9193665249.

The spelling of 4749420721 in words is "four billion, seven hundred forty-nine million, four hundred twenty thousand, seven hundred twenty-one".