13331730397 has 2 divisors, whose sum is σ = 13331730398. Its totient is φ = 13331730396.

The previous prime is 13331730371. The next prime is 13331730403. The reversal of 13331730397 is 79303713331.

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., 13273574521 + 58155876 = 115211^2 + 7626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13331730397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13331730317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665865198 + 6665865199.

It is an arithmetic number, because the mean of its divisors is an integer number (6665865199).

Almost surely, 2^13331730397 is an apocalyptic number.

It is an amenable number.

13331730397 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331730397 is an equidigital number, since it uses as much as digits as its factorization.

13331730397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107163, while the sum is 40.

The spelling of 13331730397 in words is "thirteen billion, three hundred thirty-one million, seven hundred thirty thousand, three hundred ninety-seven".