312845447 has 2 divisors, whose sum is σ = 312845448. Its totient is φ = 312845446.

The previous prime is 312845419. The next prime is 312845453. The reversal of 312845447 is 744548213.

It is a strong prime.

It is an emirp because it is prime and its reverse (744548213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312845447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312845447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312845497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156422723 + 156422724.

It is an arithmetic number, because the mean of its divisors is an integer number (156422724).

Almost surely, 2^312845447 is an apocalyptic number.

312845447 is a deficient number, since it is larger than the sum of its proper divisors (1).

312845447 is an equidigital number, since it uses as much as digits as its factorization.

312845447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 38.

The square root of 312845447 is about 17687.4375475929. The cubic root of 312845447 is about 678.8543620470.

The spelling of 312845447 in words is "three hundred twelve million, eight hundred forty-five thousand, four hundred forty-seven".