1238203717573 has 2 divisors, whose sum is σ = 1238203717574. Its totient is φ = 1238203717572.

The previous prime is 1238203717523. The next prime is 1238203717579. The reversal of 1238203717573 is 3757173028321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 816408023809 + 421795693764 = 903553^2 + 649458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1238203717573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238203717579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619101858786 + 619101858787.

It is an arithmetic number, because the mean of its divisors is an integer number (619101858787).

Almost surely, 2^{1238203717573} is an apocalyptic number.

It is an amenable number.

1238203717573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238203717573 is an equidigital number, since it uses as much as digits as its factorization.

1238203717573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 1238203717573 in words is "one trillion, two hundred thirty-eight billion, two hundred three million, seven hundred seventeen thousand, five hundred seventy-three".