287430887 has 2 divisors, whose sum is σ = 287430888. Its totient is φ = 287430886.

The previous prime is 287430851. The next prime is 287430901. The reversal of 287430887 is 788034782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287430887 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 (287430817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143715443 + 143715444.

It is an arithmetic number, because the mean of its divisors is an integer number (143715444).

Almost surely, 2^287430887 is an apocalyptic number.

287430887 is a deficient number, since it is larger than the sum of its proper divisors (1).

287430887 is an equidigital number, since it uses as much as digits as its factorization.

287430887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 602112, while the sum is 47.

The square root of 287430887 is about 16953.7868041332. The cubic root of 287430887 is about 659.9501699447.

The spelling of 287430887 in words is "two hundred eighty-seven million, four hundred thirty thousand, eight hundred eighty-seven".