318148403 has 2 divisors, whose sum is σ = 318148404. Its totient is φ = 318148402.

The previous prime is 318148349. The next prime is 318148417. The reversal of 318148403 is 304841813.

It is a strong prime.

It is an emirp because it is prime and its reverse (304841813) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318148403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318148403.

It is not a weakly prime, because it can be changed into another prime (318148463) 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 as a sum of consecutive naturals, namely, 159074201 + 159074202.

It is an arithmetic number, because the mean of its divisors is an integer number (159074202).

Almost surely, 2^318148403 is an apocalyptic number.

318148403 is a deficient number, since it is larger than the sum of its proper divisors (1).

318148403 is an equidigital number, since it uses as much as digits as its factorization.

318148403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 318148403 is about 17836.7150282780. The cubic root of 318148403 is about 682.6685816658.

The spelling of 318148403 in words is "three hundred eighteen million, one hundred forty-eight thousand, four hundred three".