318457 has 2 divisors, whose sum is σ = 318458. Its totient is φ = 318456.

The previous prime is 318443. The next prime is 318467. The reversal of 318457 is 754813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318096 + 361 = 564^2 + 19^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318457 is a prime.

318457 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (318407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159228 + 159229.

It is an arithmetic number, because the mean of its divisors is an integer number (159229).

2³¹⁸⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

318457 is a deficient number, since it is larger than the sum of its proper divisors (1).

318457 is an equidigital number, since it uses as much as digits as its factorization.

318457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 318457 is about 564.3199447122. The cubic root of 318457 is about 68.2889234875.

The spelling of 318457 in words is "three hundred eighteen thousand, four hundred fifty-seven".