243445597 has 2 divisors, whose sum is σ = 243445598. Its totient is φ = 243445596.

The previous prime is 243445541. The next prime is 243445637. The reversal of 243445597 is 795544342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167598916 + 75846681 = 12946^2 + 8709^2 .

It is a cyclic number.

It is not a de Polignac number, because 243445597 - 2¹⁹ = 242921309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243446597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121722798 + 121722799.

It is an arithmetic number, because the mean of its divisors is an integer number (121722799).

Almost surely, 2^243445597 is an apocalyptic number.

It is an amenable number.

243445597 is a deficient number, since it is larger than the sum of its proper divisors (1).

243445597 is an equidigital number, since it uses as much as digits as its factorization.

243445597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 43.

The square root of 243445597 is about 15602.7432523899. The cubic root of 243445597 is about 624.4063457379.

The spelling of 243445597 in words is "two hundred forty-three million, four hundred forty-five thousand, five hundred ninety-seven".