209466830693 has 2 divisors, whose sum is σ = 209466830694. Its totient is φ = 209466830692.

The previous prime is 209466830689. The next prime is 209466830701. The reversal of 209466830693 is 396038664902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168396971044 + 41069859649 = 410362^2 + 202657^2 .

It is a cyclic number.

It is not a de Polignac number, because 209466830693 - 2² = 209466830689 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209466830093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104733415346 + 104733415347.

It is an arithmetic number, because the mean of its divisors is an integer number (104733415347).

Almost surely, 2^209466830693 is an apocalyptic number.

It is an amenable number.

209466830693 is a deficient number, since it is larger than the sum of its proper divisors (1).

209466830693 is an equidigital number, since it uses as much as digits as its factorization.

209466830693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 56.

The spelling of 209466830693 in words is "two hundred nine billion, four hundred sixty-six million, eight hundred thirty thousand, six hundred ninety-three".