287767061 has 2 divisors, whose sum is σ = 287767062. Its totient is φ = 287767060.

The previous prime is 287767033. The next prime is 287767111. The reversal of 287767061 is 160767782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146870161 + 140896900 = 12119^2 + 11870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287767061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287767031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143883530 + 143883531.

It is an arithmetic number, because the mean of its divisors is an integer number (143883531).

Almost surely, 2^287767061 is an apocalyptic number.

It is an amenable number.

287767061 is a deficient number, since it is larger than the sum of its proper divisors (1).

287767061 is an equidigital number, since it uses as much as digits as its factorization.

287767061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 287767061 is about 16963.6983290791. The cubic root of 287767061 is about 660.2073583227.

The spelling of 287767061 in words is "two hundred eighty-seven million, seven hundred sixty-seven thousand, sixty-one".