243632897 has 2 divisors, whose sum is σ = 243632898. Its totient is φ = 243632896.

The previous prime is 243632887. The next prime is 243632903. The reversal of 243632897 is 798236342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203804176 + 39828721 = 14276^2 + 6311^2 .

It is a cyclic number.

It is not a de Polignac number, because 243632897 - 2¹⁰ = 243631873 is a prime.

It is a super-2 number, since 2×243632897² = 118713977001225218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243632887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121816448 + 121816449.

It is an arithmetic number, because the mean of its divisors is an integer number (121816449).

Almost surely, 2^243632897 is an apocalyptic number.

It is an amenable number.

243632897 is a deficient number, since it is larger than the sum of its proper divisors (1).

243632897 is an equidigital number, since it uses as much as digits as its factorization.

243632897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 44.

The square root of 243632897 is about 15608.7442480169. The cubic root of 243632897 is about 624.5664380814.

The spelling of 243632897 in words is "two hundred forty-three million, six hundred thirty-two thousand, eight hundred ninety-seven".