318949 has 2 divisors, whose sum is σ = 318950. Its totient is φ = 318948.

The previous prime is 318919. The next prime is 318979. The reversal of 318949 is 949813.

It is a balanced prime because it is at equal distance from previous prime (318919) and next prime (318979).

It can be written as a sum of positive squares in only one way, i.e., 268324 + 50625 = 518^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 318949 - 2⁵ = 318917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159474 + 159475.

It is an arithmetic number, because the mean of its divisors is an integer number (159475).

2³¹⁸⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

318949 is a deficient number, since it is larger than the sum of its proper divisors (1).

318949 is an equidigital number, since it uses as much as digits as its factorization.

318949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 318949 is about 564.7556993958. The cubic root of 318949 is about 68.3240730395.

The spelling of 318949 in words is "three hundred eighteen thousand, nine hundred forty-nine".