312280343 has 2 divisors, whose sum is σ = 312280344. Its totient is φ = 312280342.

The previous prime is 312280337. The next prime is 312280393. The reversal of 312280343 is 343082213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312280343 - 2²² = 308086039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312280393) 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, 156140171 + 156140172.

It is an arithmetic number, because the mean of its divisors is an integer number (156140172).

Almost surely, 2^312280343 is an apocalyptic number.

312280343 is a deficient number, since it is larger than the sum of its proper divisors (1).

312280343 is an equidigital number, since it uses as much as digits as its factorization.

312280343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 312280343 is about 17671.4555993557. The cubic root of 312280343 is about 678.4453693261.

The spelling of 312280343 in words is "three hundred twelve million, two hundred eighty thousand, three hundred forty-three".