12397798069 has 2 divisors, whose sum is σ = 12397798070. Its totient is φ = 12397798068.

The previous prime is 12397798037. The next prime is 12397798081. The reversal of 12397798069 is 96089779321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11376995569 + 1020802500 = 106663^2 + 31950^2 .

It is a cyclic number.

It is not a de Polignac number, because 12397798069 - 2⁵ = 12397798037 is a prime.

It is a super-2 number, since 2×12397798069² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12397797998 and 12397798016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12397798019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6198899034 + 6198899035.

It is an arithmetic number, because the mean of its divisors is an integer number (6198899035).

Almost surely, 2^12397798069 is an apocalyptic number.

It is an amenable number.

12397798069 is a deficient number, since it is larger than the sum of its proper divisors (1).

12397798069 is an equidigital number, since it uses as much as digits as its factorization.

12397798069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10287648, while the sum is 61.

The spelling of 12397798069 in words is "twelve billion, three hundred ninety-seven million, seven hundred ninety-eight thousand, sixty-nine".