89742221 has 2 divisors, whose sum is σ = 89742222. Its totient is φ = 89742220.

The previous prime is 89742217. The next prime is 89742259. The reversal of 89742221 is 12224798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80802121 + 8940100 = 8989^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 89742221 - 2² = 89742217 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89712221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44871110 + 44871111.

It is an arithmetic number, because the mean of its divisors is an integer number (44871111).

Almost surely, 2^89742221 is an apocalyptic number.

It is an amenable number.

89742221 is a deficient number, since it is larger than the sum of its proper divisors (1).

89742221 is an equidigital number, since it uses as much as digits as its factorization.

89742221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 89742221 is about 9473.2370919343. The cubic root of 89742221 is about 447.7122092053.

The spelling of 89742221 in words is "eighty-nine million, seven hundred forty-two thousand, two hundred twenty-one".