8397157 has 2 divisors, whose sum is σ = 8397158. Its totient is φ = 8397156.

The previous prime is 8397149. The next prime is 8397197. The reversal of 8397157 is 7517938.

It is an a-pointer prime, because the next prime (8397197) can be obtained adding 8397157 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7986276 + 410881 = 2826^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 8397157 - 2³ = 8397149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8397197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4198578 + 4198579.

It is an arithmetic number, because the mean of its divisors is an integer number (4198579).

Almost surely, 2^8397157 is an apocalyptic number.

It is an amenable number.

8397157 is a deficient number, since it is larger than the sum of its proper divisors (1).

8397157 is an equidigital number, since it uses as much as digits as its factorization.

8397157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 8397157 is about 2897.7848436349. The cubic root of 8397157 is about 203.2563353241.

The spelling of 8397157 in words is "eight million, three hundred ninety-seven thousand, one hundred fifty-seven".