11712991673 has 2 divisors, whose sum is σ = 11712991674. Its totient is φ = 11712991672.

The previous prime is 11712991669. The next prime is 11712991723. The reversal of 11712991673 is 37619921711.

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., 10938649744 + 774341929 = 104588^2 + 27827^2 .

It is a cyclic number.

It is not a de Polignac number, because 11712991673 - 2² = 11712991669 is a prime.

It is not a weakly prime, because it can be changed into another prime (11712991663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5856495836 + 5856495837.

It is an arithmetic number, because the mean of its divisors is an integer number (5856495837).

Almost surely, 2^11712991673 is an apocalyptic number.

It is an amenable number.

11712991673 is a deficient number, since it is larger than the sum of its proper divisors (1).

11712991673 is an equidigital number, since it uses as much as digits as its factorization.

11712991673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 47.

It can be divided in two parts, 117129 and 91673, that added together give a palindrome (208802).

The spelling of 11712991673 in words is "eleven billion, seven hundred twelve million, nine hundred ninety-one thousand, six hundred seventy-three".