318198997 has 8 divisors (see below), whose sum is σ = 337478400. Its totient is φ = 299373360.

The previous prime is 318198989. The next prime is 318199019. The reversal of 318198997 is 799891813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 318198997 - 2³ = 318198989 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 (318198967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111997 + ... + 114802.

It is an arithmetic number, because the mean of its divisors is an integer number (42184800).

Almost surely, 2^318198997 is an apocalyptic number.

It is an amenable number.

318198997 is a deficient number, since it is larger than the sum of its proper divisors (19279403).

318198997 is a wasteful number, since it uses less digits than its factorization.

318198997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226883.

The product of its digits is 979776, while the sum is 55.

The square root of 318198997 is about 17838.1332263216. The cubic root of 318198997 is about 682.7047671935.

The spelling of 318198997 in words is "three hundred eighteen million, one hundred ninety-eight thousand, nine hundred ninety-seven".