87271203889 has 3 divisors (see below), whose sum is σ = 87271499307. Its totient is φ = 87270908472.

The previous prime is 87271203881. The next prime is 87271203947. The reversal of 87271203889 is 98830217278.

The square root of 87271203889 is 295417.

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., 72094935025 + 15176268864 = 268505^2 + 123192^2 .

It is not a de Polignac number, because 87271203889 - 2³ = 87271203881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87271203881) 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, 147709 + ... + 443125.

It is an arithmetic number, because the mean of its divisors is an integer number (29090499769).

Almost surely, 2^87271203889 is an apocalyptic number.

87271203889 is the 295417-th square number.

87271203889 is the 147709-th centered octagonal number.

It is an amenable number.

87271203889 is a deficient number, since it is larger than the sum of its proper divisors (295418).

87271203889 is an frugal number, since it uses more digits than its factorization.

87271203889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590834 (or 295417 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 87271203889 in words is "eighty-seven billion, two hundred seventy-one million, two hundred three thousand, eight hundred eighty-nine".