8349691157 has 2 divisors, whose sum is σ = 8349691158. Its totient is φ = 8349691156.

The previous prime is 8349691121. The next prime is 8349691159. The reversal of 8349691157 is 7511969438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6444717841 + 1904973316 = 80279^2 + 43646^2 .

It is a cyclic number.

It is not a de Polignac number, because 8349691157 - 2¹² = 8349687061 is a prime.

Together with 8349691159, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8349691099 and 8349691108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8349691159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4174845578 + 4174845579.

It is an arithmetic number, because the mean of its divisors is an integer number (4174845579).

Almost surely, 2^8349691157 is an apocalyptic number.

It is an amenable number.

8349691157 is a deficient number, since it is larger than the sum of its proper divisors (1).

8349691157 is an equidigital number, since it uses as much as digits as its factorization.

8349691157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 8349691157 is about 91376.6444831501. The cubic root of 8349691157 is about 2028.7263526580.

The spelling of 8349691157 in words is "eight billion, three hundred forty-nine million, six hundred ninety-one thousand, one hundred fifty-seven".