243112171373 has 2 divisors, whose sum is σ = 243112171374. Its totient is φ = 243112171372.

The previous prime is 243112171363. The next prime is 243112171429. The reversal of 243112171373 is 373171211342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223939061284 + 19173110089 = 473222^2 + 138467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243112171373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243112171363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121556085686 + 121556085687.

It is an arithmetic number, because the mean of its divisors is an integer number (121556085687).

Almost surely, 2^243112171373 is an apocalyptic number.

It is an amenable number.

243112171373 is a deficient number, since it is larger than the sum of its proper divisors (1).

243112171373 is an equidigital number, since it uses as much as digits as its factorization.

243112171373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The spelling of 243112171373 in words is "two hundred forty-three billion, one hundred twelve million, one hundred seventy-one thousand, three hundred seventy-three".