201209999993 has 2 divisors, whose sum is σ = 201209999994. Its totient is φ = 201209999992.

The previous prime is 201209999983. The next prime is 201210000029. The reversal of 201209999993 is 399999902102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166242121984 + 34967878009 = 407728^2 + 186997^2 .

It is a cyclic number.

It is not a de Polignac number, because 201209999993 - 2¹⁴ = 201209983609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (201209999983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100604999996 + 100604999997.

It is an arithmetic number, because the mean of its divisors is an integer number (100604999997).

Almost surely, 2^201209999993 is an apocalyptic number.

It is an amenable number.

201209999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

201209999993 is an equidigital number, since it uses as much as digits as its factorization.

201209999993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6377292, while the sum is 62.

The spelling of 201209999993 in words is "two hundred one billion, two hundred nine million, nine hundred ninety-nine thousand, nine hundred ninety-three".