98765221 has 2 divisors, whose sum is σ = 98765222. Its totient is φ = 98765220.

The previous prime is 98765209. The next prime is 98765267. The reversal of 98765221 is 12256789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54022500 + 44742721 = 7350^2 + 6689^2 .

It is an emirp because it is prime and its reverse (12256789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98765221 - 2⁹ = 98764709 is a prime.

It is a super-3 number, since 3×98765221³ (a number of 25 digits) contains 333 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98765201) 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 as a sum of consecutive naturals, namely, 49382610 + 49382611.

It is an arithmetic number, because the mean of its divisors is an integer number (49382611).

Almost surely, 2^98765221 is an apocalyptic number.

It is an amenable number.

98765221 is a deficient number, since it is larger than the sum of its proper divisors (1).

98765221 is an equidigital number, since it uses as much as digits as its factorization.

98765221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 98765221 is about 9938.0692792916. The cubic root of 98765221 is about 462.2405202395.

The spelling of 98765221 in words is "ninety-eight million, seven hundred sixty-five thousand, two hundred twenty-one".