243725453 has 2 divisors, whose sum is σ = 243725454. Its totient is φ = 243725452.

The previous prime is 243725399. The next prime is 243725473. The reversal of 243725453 is 354527342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242954569 + 770884 = 15587^2 + 878^2 .

It is a cyclic number.

It is not a de Polignac number, because 243725453 - 2¹⁸ = 243463309 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 (243725473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121862726 + 121862727.

It is an arithmetic number, because the mean of its divisors is an integer number (121862727).

Almost surely, 2^243725453 is an apocalyptic number.

It is an amenable number.

243725453 is a deficient number, since it is larger than the sum of its proper divisors (1).

243725453 is an equidigital number, since it uses as much as digits as its factorization.

243725453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 35.

The square root of 243725453 is about 15611.7088430447. The cubic root of 243725453 is about 624.6455188804.

The spelling of 243725453 in words is "two hundred forty-three million, seven hundred twenty-five thousand, four hundred fifty-three".