243420548069 has 2 divisors, whose sum is σ = 243420548070. Its totient is φ = 243420548068.

The previous prime is 243420548057. The next prime is 243420548123. The reversal of 243420548069 is 960845024342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165699471844 + 77721076225 = 407062^2 + 278785^2 .

It is a cyclic number.

It is not a de Polignac number, because 243420548069 - 2³⁶ = 174701071333 is a prime.

It is a super-2 number, since 2×243420548069² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243420548009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121710274034 + 121710274035.

It is an arithmetic number, because the mean of its divisors is an integer number (121710274035).

Almost surely, 2^243420548069 is an apocalyptic number.

It is an amenable number.

243420548069 is a deficient number, since it is larger than the sum of its proper divisors (1).

243420548069 is an equidigital number, since it uses as much as digits as its factorization.

243420548069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 243420548069 in words is "two hundred forty-three billion, four hundred twenty million, five hundred forty-eight thousand, sixty-nine".