89281421 has 4 divisors (see below), whose sum is σ = 89383644. Its totient is φ = 89179200.

The previous prime is 89281411. The next prime is 89281427. The reversal of 89281421 is 12418298.

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 50965321 + 38316100 = 7139^2 + 6190^2 .

It is a cyclic number.

It is not a de Polignac number, because 89281421 - 2¹⁰ = 89280397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89281427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49790 + ... + 51551.

It is an arithmetic number, because the mean of its divisors is an integer number (22345911).

Almost surely, 2^89281421 is an apocalyptic number.

It is an amenable number.

89281421 is a deficient number, since it is larger than the sum of its proper divisors (102223).

89281421 is a wasteful number, since it uses less digits than its factorization.

89281421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102222.

The product of its digits is 9216, while the sum is 35.

The square root of 89281421 is about 9448.8846431735. The cubic root of 89281421 is about 446.9446035713.

The spelling of 89281421 in words is "eighty-nine million, two hundred eighty-one thousand, four hundred twenty-one".