98208421 has 2 divisors, whose sum is σ = 98208422. Its totient is φ = 98208420.

The previous prime is 98208419. The next prime is 98208457. The reversal of 98208421 is 12480289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97022500 + 1185921 = 9850^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 98208421 - 2¹ = 98208419 is a prime.

Together with 98208419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98208491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49104210 + 49104211.

It is an arithmetic number, because the mean of its divisors is an integer number (49104211).

Almost surely, 2^98208421 is an apocalyptic number.

It is an amenable number.

98208421 is a deficient number, since it is larger than the sum of its proper divisors (1).

98208421 is an equidigital number, since it uses as much as digits as its factorization.

98208421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 98208421 is about 9910.0161957486. The cubic root of 98208421 is about 461.3702385057.

The spelling of 98208421 in words is "ninety-eight million, two hundred eight thousand, four hundred twenty-one".