316978 has 4 divisors (see below), whose sum is σ = 475470. Its totient is φ = 158488.

The previous prime is 316961. The next prime is 316991. The reversal of 316978 is 879613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879613 = 7 ⋅125659.

It can be written as a sum of positive squares in only one way, i.e., 316969 + 9 = 563^2 + 3^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79243 + ... + 79246.

2³¹⁶⁹⁷⁸ is an apocalyptic number.

316978 is a deficient number, since it is larger than the sum of its proper divisors (158492).

316978 is a wasteful number, since it uses less digits than its factorization.

316978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158491.

The product of its digits is 9072, while the sum is 34.

The square root of 316978 is about 563.0079928385. The cubic root of 316978 is about 68.1830420252.

The spelling of 316978 in words is "three hundred sixteen thousand, nine hundred seventy-eight".