318488477 has 2 divisors, whose sum is σ = 318488478. Its totient is φ = 318488476.

The previous prime is 318488461. The next prime is 318488479. The reversal of 318488477 is 774884813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318051556 + 436921 = 17834^2 + 661^2 .

It is an emirp because it is prime and its reverse (774884813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318488477 - 2⁴ = 318488461 is a prime.

Together with 318488479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318488479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159244238 + 159244239.

It is an arithmetic number, because the mean of its divisors is an integer number (159244239).

Almost surely, 2^318488477 is an apocalyptic number.

It is an amenable number.

318488477 is a deficient number, since it is larger than the sum of its proper divisors (1).

318488477 is an equidigital number, since it uses as much as digits as its factorization.

318488477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1204224, while the sum is 50.

The square root of 318488477 is about 17846.2454594797. The cubic root of 318488477 is about 682.9117335650.

The spelling of 318488477 in words is "three hundred eighteen million, four hundred eighty-eight thousand, four hundred seventy-seven".