287228449 has 2 divisors, whose sum is σ = 287228450. Its totient is φ = 287228448.

The previous prime is 287228401. The next prime is 287228471. The reversal of 287228449 is 944822782.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172738449 + 114490000 = 13143^2 + 10700^2 .

It is a cyclic number.

It is not a de Polignac number, because 287228449 - 2¹³ = 287220257 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 287228399 and 287228408.

It is not a weakly prime, because it can be changed into another prime (287228479) 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, 143614224 + 143614225.

It is an arithmetic number, because the mean of its divisors is an integer number (143614225).

Almost surely, 2^287228449 is an apocalyptic number.

It is an amenable number.

287228449 is a deficient number, since it is larger than the sum of its proper divisors (1).

287228449 is an equidigital number, since it uses as much as digits as its factorization.

287228449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 46.

The square root of 287228449 is about 16947.8154639470. The cubic root of 287228449 is about 659.7951989291.

The spelling of 287228449 in words is "two hundred eighty-seven million, two hundred twenty-eight thousand, four hundred forty-nine".