12309550997 has 2 divisors, whose sum is σ = 12309550998. Its totient is φ = 12309550996.

The previous prime is 12309550993. The next prime is 12309550999. The reversal of 12309550997 is 79905590321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11915687281 + 393863716 = 109159^2 + 19846^2 .

It is a cyclic number.

It is not a de Polignac number, because 12309550997 - 2² = 12309550993 is a prime.

Together with 12309550999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12309550993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6154775498 + 6154775499.

It is an arithmetic number, because the mean of its divisors is an integer number (6154775499).

Almost surely, 2^12309550997 is an apocalyptic number.

It is an amenable number.

12309550997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12309550997 is an equidigital number, since it uses as much as digits as its factorization.

12309550997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 765450, while the sum is 50.

The spelling of 12309550997 in words is "twelve billion, three hundred nine million, five hundred fifty thousand, nine hundred ninety-seven".