6986257 has 2 divisors, whose sum is σ = 6986258. Its totient is φ = 6986256.

The previous prime is 6986219. The next prime is 6986261. The reversal of 6986257 is 7526896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4822416 + 2163841 = 2196^2 + 1471^2 .

It is a cyclic number.

It is not a de Polignac number, because 6986257 - 2¹¹ = 6984209 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6986297) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3493128 + 3493129.

It is an arithmetic number, because the mean of its divisors is an integer number (3493129).

Almost surely, 2^6986257 is an apocalyptic number.

It is an amenable number.

6986257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6986257 is an equidigital number, since it uses as much as digits as its factorization.

6986257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 6986257 is about 2643.1528521824. The cubic root of 6986257 is about 191.1678485792.

The spelling of 6986257 in words is "six million, nine hundred eighty-six thousand, two hundred fifty-seven".