243769117 has 2 divisors, whose sum is σ = 243769118. Its totient is φ = 243769116.

The previous prime is 243769093. The next prime is 243769121. The reversal of 243769117 is 711967342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225570361 + 18198756 = 15019^2 + 4266^2 .

It is a cyclic number.

It is not a de Polignac number, because 243769117 - 2⁷ = 243768989 is a prime.

It is equal to p_13356688 and since 243769117 and 13356688 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243769117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243769147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121884558 + 121884559.

It is an arithmetic number, because the mean of its divisors is an integer number (121884559).

Almost surely, 2^243769117 is an apocalyptic number.

It is an amenable number.

243769117 is a deficient number, since it is larger than the sum of its proper divisors (1).

243769117 is an equidigital number, since it uses as much as digits as its factorization.

243769117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 243769117 is about 15613.1072179755. The cubic root of 243769117 is about 624.6828189011.

The spelling of 243769117 in words is "two hundred forty-three million, seven hundred sixty-nine thousand, one hundred seventeen".