7157897 has 2 divisors, whose sum is σ = 7157898. Its totient is φ = 7157896.

The previous prime is 7157893. The next prime is 7157933. The reversal of 7157897 is 7987517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7070281 + 87616 = 2659^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 7157897 - 2² = 7157893 is a prime.

It is not a weakly prime, because it can be changed into another prime (7157893) 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, 3578948 + 3578949.

It is an arithmetic number, because the mean of its divisors is an integer number (3578949).

Almost surely, 2^7157897 is an apocalyptic number.

It is an amenable number.

7157897 is a deficient number, since it is larger than the sum of its proper divisors (1).

7157897 is an equidigital number, since it uses as much as digits as its factorization.

7157897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123480, while the sum is 44.

The square root of 7157897 is about 2675.4246391928. The cubic root of 7157897 is about 192.7207519814.

The spelling of 7157897 in words is "seven million, one hundred fifty-seven thousand, eight hundred ninety-seven".