98663221 has 2 divisors, whose sum is σ = 98663222. Its totient is φ = 98663220.

The previous prime is 98663207. The next prime is 98663239. The reversal of 98663221 is 12236689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88172100 + 10491121 = 9390^2 + 3239^2 .

It is an emirp because it is prime and its reverse (12236689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98663221 - 2⁷ = 98663093 is a prime.

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 (98663321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49331610 + 49331611.

It is an arithmetic number, because the mean of its divisors is an integer number (49331611).

Almost surely, 2^98663221 is an apocalyptic number.

It is an amenable number.

98663221 is a deficient number, since it is larger than the sum of its proper divisors (1).

98663221 is an equidigital number, since it uses as much as digits as its factorization.

98663221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 98663221 is about 9932.9361721497. The cubic root of 98663221 is about 462.0813387894.

The spelling of 98663221 in words is "ninety-eight million, six hundred sixty-three thousand, two hundred twenty-one".