89217145 has 16 divisors (see below), whose sum is σ = 109509120. Its totient is φ = 69755904.

The previous prime is 89217143. The next prime is 89217187. The reversal of 89217145 is 54171298.

It is a cyclic number.

It is not a de Polignac number, because 89217145 - 2¹ = 89217143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89217143) 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 15 ways as a sum of consecutive naturals, for example, 56152 + ... + 57718.

It is an arithmetic number, because the mean of its divisors is an integer number (6844320).

Almost surely, 2^89217145 is an apocalyptic number.

It is an amenable number.

89217145 is a deficient number, since it is larger than the sum of its proper divisors (20291975).

89217145 is a wasteful number, since it uses less digits than its factorization.

89217145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824.

The product of its digits is 20160, while the sum is 37.

The square root of 89217145 is about 9445.4827827909. The cubic root of 89217145 is about 446.8373221693.

The spelling of 89217145 in words is "eighty-nine million, two hundred seventeen thousand, one hundred forty-five".