287872859 has 4 divisors (see below), whose sum is σ = 292752120. Its totient is φ = 282993600.

The previous prime is 287872841. The next prime is 287872867. The reversal of 287872859 is 958278782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958278782 = 2 ⋅479139391.

It is a cyclic number.

It is not a de Polignac number, because 287872859 - 2¹⁶ = 287807323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287872829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2439542 + ... + 2439659.

It is an arithmetic number, because the mean of its divisors is an integer number (73188030).

Almost surely, 2^287872859 is an apocalyptic number.

287872859 is a deficient number, since it is larger than the sum of its proper divisors (4879261).

287872859 is an equidigital number, since it uses as much as digits as its factorization.

287872859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4879260.

The product of its digits is 4515840, while the sum is 56.

The square root of 287872859 is about 16966.8164073287. The cubic root of 287872859 is about 660.2882571576.

The spelling of 287872859 in words is "two hundred eighty-seven million, eight hundred seventy-two thousand, eight hundred fifty-nine".