898070221 has 2 divisors, whose sum is σ = 898070222. Its totient is φ = 898070220.

The previous prime is 898070197. The next prime is 898070249. The reversal of 898070221 is 122070898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 457532100 + 440538121 = 21390^2 + 20989^2 .

It is a cyclic number.

It is not a de Polignac number, because 898070221 - 2⁵ = 898070189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (898070281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449035110 + 449035111.

It is an arithmetic number, because the mean of its divisors is an integer number (449035111).

Almost surely, 2^898070221 is an apocalyptic number.

It is an amenable number.

898070221 is a deficient number, since it is larger than the sum of its proper divisors (1).

898070221 is an equidigital number, since it uses as much as digits as its factorization.

898070221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 898070221 is about 29967.8197571996. The cubic root of 898070221 is about 964.7988237150.

The spelling of 898070221 in words is "eight hundred ninety-eight million, seventy thousand, two hundred twenty-one".