98217421 has 2 divisors, whose sum is σ = 98217422. Its totient is φ = 98217420.

The previous prime is 98217407. The next prime is 98217467. The reversal of 98217421 is 12471289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57078025 + 41139396 = 7555^2 + 6414^2 .

It is an emirp because it is prime and its reverse (12471289) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98217421 - 2⁵ = 98217389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98212421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49108710 + 49108711.

It is an arithmetic number, because the mean of its divisors is an integer number (49108711).

Almost surely, 2^98217421 is an apocalyptic number.

It is an amenable number.

98217421 is a deficient number, since it is larger than the sum of its proper divisors (1).

98217421 is an equidigital number, since it uses as much as digits as its factorization.

98217421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 98217421 is about 9910.4702713847. The cubic root of 98217421 is about 461.3843316804.

The spelling of 98217421 in words is "ninety-eight million, two hundred seventeen thousand, four hundred twenty-one".