318149 has 4 divisors (see below), whose sum is σ = 342636. Its totient is φ = 293664.

The previous prime is 318137. The next prime is 318161. The reversal of 318149 is 941813.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (318137) and next prime (318161).

It can be written as a sum of positive squares in 2 ways, for example, as 145924 + 172225 = 382^2 + 415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12224 + ... + 12249.

It is an arithmetic number, because the mean of its divisors is an integer number (85659).

2³¹⁸¹⁴⁹ is an apocalyptic number.

It is an amenable number.

318149 is a deficient number, since it is larger than the sum of its proper divisors (24487).

318149 is a wasteful number, since it uses less digits than its factorization.

318149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24486.

The product of its digits is 864, while the sum is 26.

The square root of 318149 is about 564.0469838586. The cubic root of 318149 is about 68.2669008671.

The spelling of 318149 in words is "three hundred eighteen thousand, one hundred forty-nine".