243112949 has 2 divisors, whose sum is σ = 243112950. Its totient is φ = 243112948.

The previous prime is 243112931. The next prime is 243112979. The reversal of 243112949 is 949211342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222546724 + 20566225 = 14918^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 243112949 - 2⁸ = 243112693 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (243112979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121556474 + 121556475.

It is an arithmetic number, because the mean of its divisors is an integer number (121556475).

Almost surely, 2^243112949 is an apocalyptic number.

It is an amenable number.

243112949 is a deficient number, since it is larger than the sum of its proper divisors (1).

243112949 is an equidigital number, since it uses as much as digits as its factorization.

243112949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 243112949 is about 15592.0796880981. The cubic root of 243112949 is about 624.1218164611.

The spelling of 243112949 in words is "two hundred forty-three million, one hundred twelve thousand, nine hundred forty-nine".