243121013983 has 2 divisors, whose sum is σ = 243121013984. Its totient is φ = 243121013982.

The previous prime is 243121013959. The next prime is 243121014007. The reversal of 243121013983 is 389310121342.

243121013983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (243121013959) and next prime (243121014007).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243121013983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243121013783) 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, 121560506991 + 121560506992.

It is an arithmetic number, because the mean of its divisors is an integer number (121560506992).

Almost surely, 2^243121013983 is an apocalyptic number.

243121013983 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121013983 is an equidigital number, since it uses as much as digits as its factorization.

243121013983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 243121013983 in words is "two hundred forty-three billion, one hundred twenty-one million, thirteen thousand, nine hundred eighty-three".