89078968521 has 9 divisors (see below), whose sum is σ = 128670914541. Its totient is φ = 59385382092.

The previous prime is 89078968483. The next prime is 89078968549. The reversal of 89078968521 is 12586987098.

It is a happy number.

The square root of 89078968521 is 298461.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 89078968521 - 2²¹ = 89076871369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89078968021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 845640 + ... + 945126.

Almost surely, 2^89078968521 is an apocalyptic number.

89078968521 is the 298461-st square number.

89078968521 is the 149231-st centered octagonal number.

It is an amenable number.

89078968521 is a deficient number, since it is larger than the sum of its proper divisors (39591946020).

89078968521 is an frugal number, since it uses more digits than its factorization.

89078968521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198980 (or 99490 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 89078968521 in words is "eighty-nine billion, seventy-eight million, nine hundred sixty-eight thousand, five hundred twenty-one".