312143047 has 2 divisors, whose sum is σ = 312143048. Its totient is φ = 312143046.

The previous prime is 312143021. The next prime is 312143081. The reversal of 312143047 is 740341213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312143047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312143147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156071523 + 156071524.

It is an arithmetic number, because the mean of its divisors is an integer number (156071524).

Almost surely, 2^312143047 is an apocalyptic number.

312143047 is a deficient number, since it is larger than the sum of its proper divisors (1).

312143047 is an equidigital number, since it uses as much as digits as its factorization.

312143047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 312143047 is about 17667.5704894589. The cubic root of 312143047 is about 678.3459271723.

The spelling of 312143047 in words is "three hundred twelve million, one hundred forty-three thousand, forty-seven".