312819347 has 2 divisors, whose sum is σ = 312819348. Its totient is φ = 312819346.

The previous prime is 312819307. The next prime is 312819373. The reversal of 312819347 is 743918213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312819347 is a prime.

It is a Chen prime.

It is equal to p_16908617 and since 312819347 and 16908617 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312819347.

It is not a weakly prime, because it can be changed into another prime (312819307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156409673 + 156409674.

It is an arithmetic number, because the mean of its divisors is an integer number (156409674).

Almost surely, 2^312819347 is an apocalyptic number.

312819347 is a deficient number, since it is larger than the sum of its proper divisors (1).

312819347 is an equidigital number, since it uses as much as digits as its factorization.

312819347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 312819347 is about 17686.6997204114. The cubic root of 312819347 is about 678.8354830853.

The spelling of 312819347 in words is "three hundred twelve million, eight hundred nineteen thousand, three hundred forty-seven".