243598973 has 2 divisors, whose sum is σ = 243598974. Its totient is φ = 243598972.

The previous prime is 243598951. The next prime is 243599053. The reversal of 243598973 is 379895342.

It is a happy number.

243598973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240312004 + 3286969 = 15502^2 + 1813^2 .

It is a cyclic number.

It is not a de Polignac number, because 243598973 - 2⁶ = 243598909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243598903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121799486 + 121799487.

It is an arithmetic number, because the mean of its divisors is an integer number (121799487).

Almost surely, 2^243598973 is an apocalyptic number.

It is an amenable number.

243598973 is a deficient number, since it is larger than the sum of its proper divisors (1).

243598973 is an equidigital number, since it uses as much as digits as its factorization.

243598973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 243598973 is about 15607.6575116191. The cubic root of 243598973 is about 624.5374480509.

The spelling of 243598973 in words is "two hundred forty-three million, five hundred ninety-eight thousand, nine hundred seventy-three".