11723089309 has 2 divisors, whose sum is σ = 11723089310. Its totient is φ = 11723089308.

The previous prime is 11723089307. The next prime is 11723089387. The reversal of 11723089309 is 90398032711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8162580409 + 3560508900 = 90347^2 + 59670^2 .

It is a cyclic number.

It is not a de Polignac number, because 11723089309 - 2¹ = 11723089307 is a prime.

It is a super-3 number, since 3×11723089309³ (a number of 31 digits) contains 333 as substring.

Together with 11723089307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11723089307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5861544654 + 5861544655.

It is an arithmetic number, because the mean of its divisors is an integer number (5861544655).

Almost surely, 2^11723089309 is an apocalyptic number.

It is an amenable number.

11723089309 is a deficient number, since it is larger than the sum of its proper divisors (1).

11723089309 is an equidigital number, since it uses as much as digits as its factorization.

11723089309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 11723089309 in words is "eleven billion, seven hundred twenty-three million, eighty-nine thousand, three hundred nine".