643352701 has 2 divisors, whose sum is σ = 643352702. Its totient is φ = 643352700.

The previous prime is 643352683. The next prime is 643352719. The reversal of 643352701 is 107253346.

643352701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (643352683) and next prime (643352719).

It can be written as a sum of positive squares in only one way, i.e., 475676100 + 167676601 = 21810^2 + 12949^2 .

It is a cyclic number.

It is not a de Polignac number, because 643352701 - 2⁵ = 643352669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643352741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321676350 + 321676351.

It is an arithmetic number, because the mean of its divisors is an integer number (321676351).

Almost surely, 2^643352701 is an apocalyptic number.

It is an amenable number.

643352701 is a deficient number, since it is larger than the sum of its proper divisors (1).

643352701 is an equidigital number, since it uses as much as digits as its factorization.

643352701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 643352701 is about 25364.3982976139. The cubic root of 643352701 is about 863.2760841008.

The spelling of 643352701 in words is "six hundred forty-three million, three hundred fifty-two thousand, seven hundred one".