287447473 has 2 divisors, whose sum is σ = 287447474. Its totient is φ = 287447472.

The previous prime is 287447471. The next prime is 287447539. The reversal of 287447473 is 374744782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287404209 + 43264 = 16953^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 287447473 - 2¹ = 287447471 is a prime.

Together with 287447471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (287447471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143723736 + 143723737.

It is an arithmetic number, because the mean of its divisors is an integer number (143723737).

Almost surely, 2^287447473 is an apocalyptic number.

It is an amenable number.

287447473 is a deficient number, since it is larger than the sum of its proper divisors (1).

287447473 is an equidigital number, since it uses as much as digits as its factorization.

287447473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1053696, while the sum is 46.

The square root of 287447473 is about 16954.2759503318. The cubic root of 287447473 is about 659.9628636895.

The spelling of 287447473 in words is "two hundred eighty-seven million, four hundred forty-seven thousand, four hundred seventy-three".