287647873 has 2 divisors, whose sum is σ = 287647874. Its totient is φ = 287647872.

The previous prime is 287647823. The next prime is 287647949. The reversal of 287647873 is 378746782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284158449 + 3489424 = 16857^2 + 1868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287647873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 287647873.

It is not a weakly prime, because it can be changed into another prime (287647823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143823936 + 143823937.

It is an arithmetic number, because the mean of its divisors is an integer number (143823937).

Almost surely, 2^287647873 is an apocalyptic number.

It is an amenable number.

287647873 is a deficient number, since it is larger than the sum of its proper divisors (1).

287647873 is an equidigital number, since it uses as much as digits as its factorization.

287647873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 52.

The square root of 287647873 is about 16960.1849341332. The cubic root of 287647873 is about 660.1161970194.

The spelling of 287647873 in words is "two hundred eighty-seven million, six hundred forty-seven thousand, eight hundred seventy-three".