12327291397 has 2 divisors, whose sum is σ = 12327291398. Its totient is φ = 12327291396.

The previous prime is 12327291367. The next prime is 12327291401. The reversal of 12327291397 is 79319272321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6259816161 + 6067475236 = 79119^2 + 77894^2 .

It is an emirp because it is prime and its reverse (79319272321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12327291397 - 2³¹ = 10179807749 is a prime.

It is a super-2 number, since 2×12327291397² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12327291367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6163645698 + 6163645699.

It is an arithmetic number, because the mean of its divisors is an integer number (6163645699).

Almost surely, 2^12327291397 is an apocalyptic number.

It is an amenable number.

12327291397 is a deficient number, since it is larger than the sum of its proper divisors (1).

12327291397 is an equidigital number, since it uses as much as digits as its factorization.

12327291397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The spelling of 12327291397 in words is "twelve billion, three hundred twenty-seven million, two hundred ninety-one thousand, three hundred ninety-seven".