87285384481 has 3 divisors (see below), whose sum is σ = 87285679923. Its totient is φ = 87285089040.

The previous prime is 87285384479. The next prime is 87285384493. The reversal of 87285384481 is 18448358278.

It is a happy number.

The square root of 87285384481 is 295441.

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.

It can be written as a sum of positive squares in only one way, i.e., 76733986081 + 10551398400 = 277009^2 + 102720^2 .

It is not a de Polignac number, because 87285384481 - 2¹ = 87285384479 is a prime.

It is a super-2 number, since 2×87285384481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87283384481) 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, 147721 + ... + 443161.

It is an arithmetic number, because the mean of its divisors is an integer number (29095226641).

Almost surely, 2^87285384481 is an apocalyptic number.

87285384481 is the 295441-st square number.

87285384481 is the 147721-st centered octagonal number.

It is an amenable number.

87285384481 is a deficient number, since it is larger than the sum of its proper divisors (295442).

87285384481 is an frugal number, since it uses more digits than its factorization.

87285384481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590882 (or 295441 counting only the distinct ones).

The product of its digits is 13762560, while the sum is 58.

The spelling of 87285384481 in words is "eighty-seven billion, two hundred eighty-five million, three hundred eighty-four thousand, four hundred eighty-one".