287668867 has 2 divisors, whose sum is σ = 287668868. Its totient is φ = 287668866.

The previous prime is 287668861. The next prime is 287668891. The reversal of 287668867 is 768866782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 287668867 - 2³ = 287668859 is a prime.

It is not a weakly prime, because it can be changed into another prime (287668861) 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, 143834433 + 143834434.

It is an arithmetic number, because the mean of its divisors is an integer number (143834434).

Almost surely, 2^287668867 is an apocalyptic number.

287668867 is a deficient number, since it is larger than the sum of its proper divisors (1).

287668867 is an equidigital number, since it uses as much as digits as its factorization.

287668867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10838016, while the sum is 58.

The square root of 287668867 is about 16960.8038429787. The cubic root of 287668867 is about 660.1322561709.

The spelling of 287668867 in words is "two hundred eighty-seven million, six hundred sixty-eight thousand, eight hundred sixty-seven".