318683039989 has 4 divisors (see below), whose sum is σ = 319180206060. Its totient is φ = 318185873920.

The previous prime is 318683039957. The next prime is 318683040007. The reversal of 318683039989 is 989930386813.

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

It can be written as a sum of positive squares in 2 ways, for example, as 304519659889 + 14163380100 = 551833^2 + 119010^2 .

It is a cyclic number.

It is not a de Polignac number, because 318683039989 - 2⁵ = 318683039957 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 (318683039189) 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, 248582074 + ... + 248583355.

It is an arithmetic number, because the mean of its divisors is an integer number (79795051515).

Almost surely, 2^318683039989 is an apocalyptic number.

It is an amenable number.

318683039989 is a deficient number, since it is larger than the sum of its proper divisors (497166071).

318683039989 is an equidigital number, since it uses as much as digits as its factorization.

318683039989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497166070.

The product of its (nonzero) digits is 60466176, while the sum is 67.

The spelling of 318683039989 in words is "three hundred eighteen billion, six hundred eighty-three million, thirty-nine thousand, nine hundred eighty-nine".