243119797 has 2 divisors, whose sum is σ = 243119798. Its totient is φ = 243119796.

The previous prime is 243119777. The next prime is 243119819. The reversal of 243119797 is 797911342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196252081 + 46867716 = 14009^2 + 6846^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243119797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243119717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121559898 + 121559899.

It is an arithmetic number, because the mean of its divisors is an integer number (121559899).

Almost surely, 2^243119797 is an apocalyptic number.

It is an amenable number.

243119797 is a deficient number, since it is larger than the sum of its proper divisors (1).

243119797 is an equidigital number, since it uses as much as digits as its factorization.

243119797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 43.

The square root of 243119797 is about 15592.2992852241. The cubic root of 243119797 is about 624.1276764891.

The spelling of 243119797 in words is "two hundred forty-three million, one hundred nineteen thousand, seven hundred ninety-seven".