287796842089 has 3 divisors (see below), whose sum is σ = 287797378557. Its totient is φ = 287796305622.

The previous prime is 287796842077. The next prime is 287796842111. The reversal of 287796842089 is 980248697782.

The square root of 287796842089 is 536467.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 980248697782 = 2 ⋅490124348891.

It is not a de Polignac number, because 287796842089 - 2¹³ = 287796833897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287796842029) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 268234 + ... + 804700.

It is an arithmetic number, because the mean of its divisors is an integer number (95932459519).

Almost surely, 2^287796842089 is an apocalyptic number.

287796842089 is the 536467-th square number.

287796842089 is the 268234-th centered octagonal number.

It is an amenable number.

287796842089 is a deficient number, since it is larger than the sum of its proper divisors (536468).

287796842089 is an frugal number, since it uses more digits than its factorization.

287796842089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072934 (or 536467 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 70.

The spelling of 287796842089 in words is "two hundred eighty-seven billion, seven hundred ninety-six million, eight hundred forty-two thousand, eighty-nine".