243120454039 has 2 divisors, whose sum is σ = 243120454040. Its totient is φ = 243120454038.

The previous prime is 243120454019. The next prime is 243120454061. The reversal of 243120454039 is 930454021342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243120454039 - 2¹¹ = 243120451991 is a prime.

It is a super-2 number, since 2×243120454039² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243120453989 and 243120454007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243120454019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560227019 + 121560227020.

It is an arithmetic number, because the mean of its divisors is an integer number (121560227020).

Almost surely, 2^243120454039 is an apocalyptic number.

243120454039 is a deficient number, since it is larger than the sum of its proper divisors (1).

243120454039 is an equidigital number, since it uses as much as digits as its factorization.

243120454039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 243120454039 in words is "two hundred forty-three billion, one hundred twenty million, four hundred fifty-four thousand, thirty-nine".