209207068117 has 2 divisors, whose sum is σ = 209207068118. Its totient is φ = 209207068116.

The previous prime is 209207068073. The next prime is 209207068129. The reversal of 209207068117 is 711860702902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139895448676 + 69311619441 = 374026^2 + 263271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209207068117 is a prime.

It is a super-2 number, since 2×209207068117² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209207048117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104603534058 + 104603534059.

It is an arithmetic number, because the mean of its divisors is an integer number (104603534059).

Almost surely, 2^209207068117 is an apocalyptic number.

It is an amenable number.

209207068117 is a deficient number, since it is larger than the sum of its proper divisors (1).

209207068117 is an equidigital number, since it uses as much as digits as its factorization.

209207068117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 43.

The spelling of 209207068117 in words is "two hundred nine billion, two hundred seven million, sixty-eight thousand, one hundred seventeen".