209112490319 has 2 divisors, whose sum is σ = 209112490320. Its totient is φ = 209112490318.

The previous prime is 209112490313. The next prime is 209112490343. The reversal of 209112490319 is 913094211902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 209112490319 - 2⁴ = 209112490303 is a prime.

It is a super-2 number, since 2×209112490319² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209112490313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104556245159 + 104556245160.

It is an arithmetic number, because the mean of its divisors is an integer number (104556245160).

Almost surely, 2^209112490319 is an apocalyptic number.

209112490319 is a deficient number, since it is larger than the sum of its proper divisors (1).

209112490319 is an equidigital number, since it uses as much as digits as its factorization.

209112490319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The spelling of 209112490319 in words is "two hundred nine billion, one hundred twelve million, four hundred ninety thousand, three hundred nineteen".