318398949 has 24 divisors (see below), whose sum is σ = 515285472. Its totient is φ = 187751520.

The previous prime is 318398947. The next prime is 318398953. The reversal of 318398949 is 949893813.

It is not a de Polignac number, because 318398949 - 2¹ = 318398947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 318398895 and 318398904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318398947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39799 + ... + 47124.

It is an arithmetic number, because the mean of its divisors is an integer number (21470228).

Almost surely, 2^318398949 is an apocalyptic number.

It is an amenable number.

318398949 is a deficient number, since it is larger than the sum of its proper divisors (196886523).

318398949 is a wasteful number, since it uses less digits than its factorization.

318398949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86977 (or 86974 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 318398949 is about 17843.7369684716. The cubic root of 318398949 is about 682.8477381033.

The spelling of 318398949 in words is "three hundred eighteen million, three hundred ninety-eight thousand, nine hundred forty-nine".