287900163 has 20 divisors (see below), whose sum is σ = 432831520. Its totient is φ = 190702512.

The previous prime is 287900161. The next prime is 287900167. The reversal of 287900163 is 361009782.

It is not a de Polignac number, because 287900163 - 2¹ = 287900161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287900161) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1398 + ... + 24036.

It is an arithmetic number, because the mean of its divisors is an integer number (21641576).

Almost surely, 2^287900163 is an apocalyptic number.

287900163 is a deficient number, since it is larger than the sum of its proper divisors (144931357).

287900163 is a wasteful number, since it uses less digits than its factorization.

287900163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22808 (or 22799 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 287900163 is about 16967.6210176913. The cubic root of 287900163 is about 660.3091320450.

The spelling of 287900163 in words is "two hundred eighty-seven million, nine hundred thousand, one hundred sixty-three".