4243209973 has 2 divisors, whose sum is σ = 4243209974. Its totient is φ = 4243209972.

The previous prime is 4243209953. The next prime is 4243210021. The reversal of 4243209973 is 3799023424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4188937284 + 54272689 = 64722^2 + 7367^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243209973 - 2²⁹ = 3706339061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4243209923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121604986 + 2121604987.

It is an arithmetic number, because the mean of its divisors is an integer number (2121604987).

Almost surely, 2^4243209973 is an apocalyptic number.

It is an amenable number.

4243209973 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243209973 is an equidigital number, since it uses as much as digits as its factorization.

4243209973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 4243209973 is about 65139.9261052697. The cubic root of 4243209973 is about 1618.9428113617.

The spelling of 4243209973 in words is "four billion, two hundred forty-three million, two hundred nine thousand, nine hundred seventy-three".