243613165403 has 2 divisors, whose sum is σ = 243613165404. Its totient is φ = 243613165402.

The previous prime is 243613165399. The next prime is 243613165487. The reversal of 243613165403 is 304561316342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243613165403 - 2² = 243613165399 is a prime.

It is not a weakly prime, because it can be changed into another prime (243613165703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121806582701 + 121806582702.

It is an arithmetic number, because the mean of its divisors is an integer number (121806582702).

Almost surely, 2^243613165403 is an apocalyptic number.

243613165403 is a deficient number, since it is larger than the sum of its proper divisors (1).

243613165403 is an equidigital number, since it uses as much as digits as its factorization.

243613165403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 243613165403 in words is "two hundred forty-three billion, six hundred thirteen million, one hundred sixty-five thousand, four hundred three".