89721231 has 8 divisors (see below), whose sum is σ = 120362880. Its totient is φ = 59446872.

The previous prime is 89721199. The next prime is 89721239. The reversal of 89721231 is 13212798.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 89721231 - 2⁵ = 89721199 is a prime.

It is a super-2 number, since 2×89721231² = 16099798584310722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 89721192 and 89721201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89721239) 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 7 ways as a sum of consecutive naturals, for example, 91251 + ... + 92228.

It is an arithmetic number, because the mean of its divisors is an integer number (15045360).

Almost surely, 2^89721231 is an apocalyptic number.

89721231 is a deficient number, since it is larger than the sum of its proper divisors (30641649).

89721231 is a wasteful number, since it uses less digits than its factorization.

89721231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183645.

The product of its digits is 6048, while the sum is 33.

The square root of 89721231 is about 9472.1291693051. The cubic root of 89721231 is about 447.6773010282.

The spelling of 89721231 in words is "eighty-nine million, seven hundred twenty-one thousand, two hundred thirty-one".