287940241 has 2 divisors, whose sum is σ = 287940242. Its totient is φ = 287940240.

The previous prime is 287940229. The next prime is 287940259. The reversal of 287940241 is 142049782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271293841 + 16646400 = 16471^2 + 4080^2 .

It is a cyclic number.

It is not a de Polignac number, because 287940241 - 2⁷ = 287940113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 287940241.

It is not a weakly prime, because it can be changed into another prime (287940221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143970120 + 143970121.

It is an arithmetic number, because the mean of its divisors is an integer number (143970121).

Almost surely, 2^287940241 is an apocalyptic number.

It is an amenable number.

287940241 is a deficient number, since it is larger than the sum of its proper divisors (1).

287940241 is an equidigital number, since it uses as much as digits as its factorization.

287940241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 287940241 is about 16968.8019907122. The cubic root of 287940241 is about 660.3397707234.

The spelling of 287940241 in words is "two hundred eighty-seven million, nine hundred forty thousand, two hundred forty-one".