4345603721 has 2 divisors, whose sum is σ = 4345603722. Its totient is φ = 4345603720.

The previous prime is 4345603709. The next prime is 4345603741. The reversal of 4345603721 is 1273065434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4307953225 + 37650496 = 65635^2 + 6136^2 .

It is a cyclic number.

It is not a de Polignac number, because 4345603721 - 2¹⁸ = 4345341577 is a prime.

It is not a weakly prime, because it can be changed into another prime (4345603741) 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, 2172801860 + 2172801861.

It is an arithmetic number, because the mean of its divisors is an integer number (2172801861).

Almost surely, 2^4345603721 is an apocalyptic number.

It is an amenable number.

4345603721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4345603721 is an equidigital number, since it uses as much as digits as its factorization.

4345603721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 4345603721 is about 65921.1932613481. The cubic root of 4345603721 is about 1631.8617893707.

The spelling of 4345603721 in words is "four billion, three hundred forty-five million, six hundred three thousand, seven hundred twenty-one".