89831321 has 2 divisors, whose sum is σ = 89831322. Its totient is φ = 89831320.

The previous prime is 89831309. The next prime is 89831327. The reversal of 89831321 is 12313898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89775625 + 55696 = 9475^2 + 236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89831321 is a prime.

It is a super-3 number, since 3×89831321³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89831327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44915660 + 44915661.

It is an arithmetic number, because the mean of its divisors is an integer number (44915661).

Almost surely, 2^89831321 is an apocalyptic number.

It is an amenable number.

89831321 is a deficient number, since it is larger than the sum of its proper divisors (1).

89831321 is an equidigital number, since it uses as much as digits as its factorization.

89831321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 89831321 is about 9477.9386471954. The cubic root of 89831321 is about 447.8603296135.

The spelling of 89831321 in words is "eighty-nine million, eight hundred thirty-one thousand, three hundred twenty-one".