243149029373 has 2 divisors, whose sum is σ = 243149029374. Its totient is φ = 243149029372.

The previous prime is 243149029369. The next prime is 243149029379. The reversal of 243149029373 is 373920941342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124170254884 + 118978774489 = 352378^2 + 344933^2 .

It is a cyclic number.

It is not a de Polignac number, because 243149029373 - 2² = 243149029369 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243149029379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121574514686 + 121574514687.

It is an arithmetic number, because the mean of its divisors is an integer number (121574514687).

Almost surely, 2^243149029373 is an apocalyptic number.

It is an amenable number.

243149029373 is a deficient number, since it is larger than the sum of its proper divisors (1).

243149029373 is an equidigital number, since it uses as much as digits as its factorization.

243149029373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 47.

The spelling of 243149029373 in words is "two hundred forty-three billion, one hundred forty-nine million, twenty-nine thousand, three hundred seventy-three".