11905309469 has 2 divisors, whose sum is σ = 11905309470. Its totient is φ = 11905309468.

The previous prime is 11905309447. The next prime is 11905309543. The reversal of 11905309469 is 96490350911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9223105369 + 2682204100 = 96037^2 + 51790^2 .

It is an emirp because it is prime and its reverse (96490350911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11905309469 - 2²⁸ = 11636874013 is a prime.

It is a super-3 number, since 3×11905309469³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11905309439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5952654734 + 5952654735.

It is an arithmetic number, because the mean of its divisors is an integer number (5952654735).

Almost surely, 2^11905309469 is an apocalyptic number.

It is an amenable number.

11905309469 is a deficient number, since it is larger than the sum of its proper divisors (1).

11905309469 is an equidigital number, since it uses as much as digits as its factorization.

11905309469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 47.

The spelling of 11905309469 in words is "eleven billion, nine hundred five million, three hundred nine thousand, four hundred sixty-nine".