6997157 has 2 divisors, whose sum is σ = 6997158. Its totient is φ = 6997156.

The previous prime is 6997153. The next prime is 6997163. The reversal of 6997157 is 7517996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4456321 + 2540836 = 2111^2 + 1594^2 .

It is a cyclic number.

It is not a de Polignac number, because 6997157 - 2² = 6997153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6997153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3498578 + 3498579.

It is an arithmetic number, because the mean of its divisors is an integer number (3498579).

Almost surely, 2^6997157 is an apocalyptic number.

It is an amenable number.

6997157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6997157 is an equidigital number, since it uses as much as digits as its factorization.

6997157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 44.

The square root of 6997157 is about 2645.2139800024. The cubic root of 6997157 is about 191.2672173259.

The spelling of 6997157 in words is "six million, nine hundred ninety-seven thousand, one hundred fifty-seven".