287928828101 has 4 divisors (see below), whose sum is σ = 287948280492. Its totient is φ = 287909375712.

The previous prime is 287928828071. The next prime is 287928828107. The reversal of 287928828101 is 101828829782.

It is a Cunningham number, because it is equal to 536590²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85775179876 + 202153648225 = 292874^2 + 449615^2 .

It is a cyclic number.

It is not a de Polignac number, because 287928828101 - 2⁶ = 287928828037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287928828107) 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, 9703976 + ... + 9733601.

It is an arithmetic number, because the mean of its divisors is an integer number (71987070123).

Almost surely, 2^287928828101 is an apocalyptic number.

It is an amenable number.

287928828101 is a deficient number, since it is larger than the sum of its proper divisors (19452391).

287928828101 is a wasteful number, since it uses less digits than its factorization.

287928828101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19452390.

The product of its (nonzero) digits is 2064384, while the sum is 56.

The spelling of 287928828101 in words is "two hundred eighty-seven billion, nine hundred twenty-eight million, eight hundred twenty-eight thousand, one hundred one".