318998 has 4 divisors (see below), whose sum is σ = 478500. Its totient is φ = 159498.

The previous prime is 318979. The next prime is 319001. The reversal of 318998 is 899813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899813 = 797 ⋅1129.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79748 + ... + 79751.

It is an arithmetic number, because the mean of its divisors is an integer number (119625).

2³¹⁸⁹⁹⁸ is an apocalyptic number.

318998 is a deficient number, since it is larger than the sum of its proper divisors (159502).

318998 is a wasteful number, since it uses less digits than its factorization.

318998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159501.

The product of its digits is 15552, while the sum is 38.

The square root of 318998 is about 564.7990793194. The cubic root of 318998 is about 68.3275717265.

The spelling of 318998 in words is "three hundred eighteen thousand, nine hundred ninety-eight".