243402953 has 2 divisors, whose sum is σ = 243402954. Its totient is φ = 243402952.

The previous prime is 243402911. The next prime is 243403007. The reversal of 243402953 is 359204342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151856329 + 91546624 = 12323^2 + 9568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243402953 is a prime.

It is not a weakly prime, because it can be changed into another prime (243402053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121701476 + 121701477.

It is an arithmetic number, because the mean of its divisors is an integer number (121701477).

Almost surely, 2^243402953 is an apocalyptic number.

It is an amenable number.

243402953 is a deficient number, since it is larger than the sum of its proper divisors (1).

243402953 is an equidigital number, since it uses as much as digits as its factorization.

243402953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 243402953 is about 15601.3766379765. The cubic root of 243402953 is about 624.3698848346.

The spelling of 243402953 in words is "two hundred forty-three million, four hundred two thousand, nine hundred fifty-three".