318663489 has 4 divisors (see below), whose sum is σ = 424884656. Its totient is φ = 212442324.

The previous prime is 318663479. The next prime is 318663491. The reversal of 318663489 is 984366813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 984366813 = 3 ⋅328122271.

It is not a de Polignac number, because 318663489 - 2²⁸ = 50228033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318663409) 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, 53110579 + ... + 53110584.

It is an arithmetic number, because the mean of its divisors is an integer number (106221164).

Almost surely, 2^318663489 is an apocalyptic number.

It is an amenable number.

318663489 is a deficient number, since it is larger than the sum of its proper divisors (106221167).

318663489 is a wasteful number, since it uses less digits than its factorization.

318663489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106221166.

The product of its digits is 746496, while the sum is 48.

The square root of 318663489 is about 17851.1481143371. The cubic root of 318663489 is about 683.0367991709.

The spelling of 318663489 in words is "three hundred eighteen million, six hundred sixty-three thousand, four hundred eighty-nine".