287947249 has 2 divisors, whose sum is σ = 287947250. Its totient is φ = 287947248.

The previous prime is 287947243. The next prime is 287947271. The reversal of 287947249 is 942749782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287913024 + 34225 = 16968^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 287947249 - 2¹⁵ = 287914481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 287947196 and 287947205.

It is not a weakly prime, because it can be changed into another prime (287947243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143973624 + 143973625.

It is an arithmetic number, because the mean of its divisors is an integer number (143973625).

Almost surely, 2^287947249 is an apocalyptic number.

It is an amenable number.

287947249 is a deficient number, since it is larger than the sum of its proper divisors (1).

287947249 is an equidigital number, since it uses as much as digits as its factorization.

287947249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The square root of 287947249 is about 16969.0084860607. The cubic root of 287947249 is about 660.3451278808.

The spelling of 287947249 in words is "two hundred eighty-seven million, nine hundred forty-seven thousand, two hundred forty-nine".