243311200973 has 2 divisors, whose sum is σ = 243311200974. Its totient is φ = 243311200972.

The previous prime is 243311200969. The next prime is 243311201041. The reversal of 243311200973 is 379002113342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243189032164 + 122168809 = 493142^2 + 11053^2 .

It is a cyclic number.

It is not a de Polignac number, because 243311200973 - 2² = 243311200969 is a prime.

It is a super-2 number, since 2×243311200973² (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 (243311200943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121655600486 + 121655600487.

It is an arithmetic number, because the mean of its divisors is an integer number (121655600487).

Almost surely, 2^243311200973 is an apocalyptic number.

It is an amenable number.

243311200973 is a deficient number, since it is larger than the sum of its proper divisors (1).

243311200973 is an equidigital number, since it uses as much as digits as its factorization.

243311200973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The spelling of 243311200973 in words is "two hundred forty-three billion, three hundred eleven million, two hundred thousand, nine hundred seventy-three".