89447181 has 16 divisors (see below), whose sum is σ = 122337600. Its totient is φ = 58101120.

The previous prime is 89447147. The next prime is 89447209. The reversal of 89447181 is 18174498.

It is not a de Polignac number, because 89447181 - 2¹⁴ = 89430797 is a prime.

It is a super-4 number, since 4×89447181⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89447131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84745 + ... + 85793.

It is an arithmetic number, because the mean of its divisors is an integer number (7646100).

Almost surely, 2^89447181 is an apocalyptic number.

It is an amenable number.

89447181 is a deficient number, since it is larger than the sum of its proper divisors (32890419).

89447181 is a wasteful number, since it uses less digits than its factorization.

89447181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756.

The product of its digits is 64512, while the sum is 42.

The square root of 89447181 is about 9457.6519813324. The cubic root of 89447181 is about 447.2210318763.

The spelling of 89447181 in words is "eighty-nine million, four hundred forty-seven thousand, one hundred eighty-one".