8691157 has 2 divisors, whose sum is σ = 8691158. Its totient is φ = 8691156.

The previous prime is 8691127. The next prime is 8691167. The reversal of 8691157 is 7511968.

8691157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5447556 + 3243601 = 2334^2 + 1801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8691157 is a prime.

It is a Chen prime.

8691157 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8691127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4345578 + 4345579.

It is an arithmetic number, because the mean of its divisors is an integer number (4345579).

Almost surely, 2^8691157 is an apocalyptic number.

It is an amenable number.

8691157 is a deficient number, since it is larger than the sum of its proper divisors (1).

8691157 is an equidigital number, since it uses as much as digits as its factorization.

8691157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 37.

The square root of 8691157 is about 2948.0768307492. The cubic root of 8691157 is about 205.6013041371.

It can be divided in two parts, 86911 and 57, that added together give a palindrome (86968).

The spelling of 8691157 in words is "eight million, six hundred ninety-one thousand, one hundred fifty-seven".