318673722889 has 2 divisors, whose sum is σ = 318673722890. Its totient is φ = 318673722888.

The previous prime is 318673722859. The next prime is 318673722931. The reversal of 318673722889 is 988227376813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261453255625 + 57220467264 = 511325^2 + 239208^2 .

It is a cyclic number.

It is not a de Polignac number, because 318673722889 - 2¹⁹ = 318673198601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318673722889.

It is not a weakly prime, because it can be changed into another prime (318673722859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159336861444 + 159336861445.

It is an arithmetic number, because the mean of its divisors is an integer number (159336861445).

Almost surely, 2^318673722889 is an apocalyptic number.

It is an amenable number.

318673722889 is a deficient number, since it is larger than the sum of its proper divisors (1).

318673722889 is an equidigital number, since it uses as much as digits as its factorization.

318673722889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 64.

The spelling of 318673722889 in words is "three hundred eighteen billion, six hundred seventy-three million, seven hundred twenty-two thousand, eight hundred eighty-nine".