243303953 has 2 divisors, whose sum is σ = 243303954. Its totient is φ = 243303952.

The previous prime is 243303941. The next prime is 243303961. The reversal of 243303953 is 359303342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164147344 + 79156609 = 12812^2 + 8897^2 .

It is a cyclic number.

It is not a de Polignac number, because 243303953 - 2⁴ = 243303937 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (243303923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121651976 + 121651977.

It is an arithmetic number, because the mean of its divisors is an integer number (121651977).

Almost surely, 2^243303953 is an apocalyptic number.

It is an amenable number.

243303953 is a deficient number, since it is larger than the sum of its proper divisors (1).

243303953 is an equidigital number, since it uses as much as digits as its factorization.

243303953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 32.

The square root of 243303953 is about 15598.2035183543. The cubic root of 243303953 is about 624.2852227545.

The spelling of 243303953 in words is "two hundred forty-three million, three hundred three thousand, nine hundred fifty-three".