287667487 has 2 divisors, whose sum is σ = 287667488. Its totient is φ = 287667486.

The previous prime is 287667473. The next prime is 287667587. The reversal of 287667487 is 784766782.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 287667487 - 2¹⁵ = 287634719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287667587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143833743 + 143833744.

It is an arithmetic number, because the mean of its divisors is an integer number (143833744).

Almost surely, 2^287667487 is an apocalyptic number.

287667487 is a deficient number, since it is larger than the sum of its proper divisors (1).

287667487 is an equidigital number, since it uses as much as digits as its factorization.

287667487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6322176, while the sum is 55.

The square root of 287667487 is about 16960.7631608958. The cubic root of 287667487 is about 660.1312005776.

The spelling of 287667487 in words is "two hundred eighty-seven million, six hundred sixty-seven thousand, four hundred eighty-seven".