8113636397 has 2 divisors, whose sum is σ = 8113636398. Its totient is φ = 8113636396.

The previous prime is 8113636361. The next prime is 8113636409. The reversal of 8113636397 is 7936363118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5457367876 + 2656268521 = 73874^2 + 51539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8113636397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8113636897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4056818198 + 4056818199.

It is an arithmetic number, because the mean of its divisors is an integer number (4056818199).

Almost surely, 2^8113636397 is an apocalyptic number.

It is an amenable number.

8113636397 is a deficient number, since it is larger than the sum of its proper divisors (1).

8113636397 is an equidigital number, since it uses as much as digits as its factorization.

8113636397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The square root of 8113636397 is about 90075.7259032643. The cubic root of 8113636397 is about 2009.4252126594.

The spelling of 8113636397 in words is "eight billion, one hundred thirteen million, six hundred thirty-six thousand, three hundred ninety-seven".