243453653 has 2 divisors, whose sum is σ = 243453654. Its totient is φ = 243453652.

The previous prime is 243453629. The next prime is 243453667. The reversal of 243453653 is 356354342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187772209 + 55681444 = 13703^2 + 7462^2 .

It is a cyclic number.

It is not a de Polignac number, because 243453653 - 2²⁶ = 176344789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243453053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121726826 + 121726827.

It is an arithmetic number, because the mean of its divisors is an integer number (121726827).

Almost surely, 2^243453653 is an apocalyptic number.

It is an amenable number.

243453653 is a deficient number, since it is larger than the sum of its proper divisors (1).

243453653 is an equidigital number, since it uses as much as digits as its factorization.

243453653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 35.

The square root of 243453653 is about 15603.0014099852. The cubic root of 243453653 is about 624.4132331933.

The spelling of 243453653 in words is "two hundred forty-three million, four hundred fifty-three thousand, six hundred fifty-three".