89128481 has 4 divisors (see below), whose sum is σ = 95984532. Its totient is φ = 82272432.

The previous prime is 89128477. The next prime is 89128483. The reversal of 89128481 is 18482198.

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 6027025 + 83101456 = 2455^2 + 9116^2 .

It is a cyclic number.

It is not a de Polignac number, because 89128481 - 2² = 89128477 is a prime.

It is a super-2 number, since 2×89128481² = 15887772250734722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89128483) 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, 3428006 + ... + 3428031.

It is an arithmetic number, because the mean of its divisors is an integer number (23996133).

Almost surely, 2^89128481 is an apocalyptic number.

It is an amenable number.

89128481 is a deficient number, since it is larger than the sum of its proper divisors (6856051).

89128481 is a wasteful number, since it uses less digits than its factorization.

89128481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6856050.

The product of its digits is 36864, while the sum is 41.

The square root of 89128481 is about 9440.7881556573. The cubic root of 89128481 is about 446.6892507949.

The spelling of 89128481 in words is "eighty-nine million, one hundred twenty-eight thousand, four hundred eighty-one".