89488440387889 has 3 divisors (see below), whose sum is σ = 89488449847723. Its totient is φ = 89488430928056.

The previous prime is 89488440387881. The next prime is 89488440387901. The reversal of 89488440387889 is 98878304488498.

The square root of 89488440387889 is 9459833.

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., 62751350480625 + 26737089907264 = 7921575^2 + 5170792^2 .

It is not a de Polignac number, because 89488440387889 - 2³ = 89488440387881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89488440387881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4729917 + ... + 14189749.

Almost surely, 2^{89488440387889} is an apocalyptic number.

89488440387889 is the 9459833-rd square number.

89488440387889 is the 4729917-th centered octagonal number.

It is an amenable number.

89488440387889 is a deficient number, since it is larger than the sum of its proper divisors (9459834).

89488440387889 is an frugal number, since it uses more digits than its factorization.

89488440387889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18919666 (or 9459833 counting only the distinct ones).

The product of its (nonzero) digits is 28538044416, while the sum is 88.

The spelling of 89488440387889 in words is "eighty-nine trillion, four hundred eighty-eight billion, four hundred forty million, three hundred eighty-seven thousand, eight hundred eighty-nine".