243310849 has 2 divisors, whose sum is σ = 243310850. Its totient is φ = 243310848.

The previous prime is 243310807. The next prime is 243310861. The reversal of 243310849 is 948013342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194100624 + 49210225 = 13932^2 + 7015^2 .

It is a cyclic number.

It is not a de Polignac number, because 243310849 - 2⁹ = 243310337 is a prime.

It is a super-2 number, since 2×243310849² = 118400338482201602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243310349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121655424 + 121655425.

It is an arithmetic number, because the mean of its divisors is an integer number (121655425).

Almost surely, 2^243310849 is an apocalyptic number.

It is an amenable number.

243310849 is a deficient number, since it is larger than the sum of its proper divisors (1).

243310849 is an equidigital number, since it uses as much as digits as its factorization.

243310849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 243310849 is about 15598.4245678851. The cubic root of 243310849 is about 624.2911207683.

The spelling of 243310849 in words is "two hundred forty-three million, three hundred ten thousand, eight hundred forty-nine".