98447681 has 2 divisors, whose sum is σ = 98447682. Its totient is φ = 98447680.

The previous prime is 98447651. The next prime is 98447693. The reversal of 98447681 is 18674489.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61481281 + 36966400 = 7841^2 + 6080^2 .

It is an emirp because it is prime and its reverse (18674489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98447681 - 2¹⁸ = 98185537 is a prime.

It is a super-2 number, since 2×98447681² = 19383891788555522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (98447641) 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, 49223840 + 49223841.

It is an arithmetic number, because the mean of its divisors is an integer number (49223841).

Almost surely, 2^98447681 is an apocalyptic number.

It is an amenable number.

98447681 is a deficient number, since it is larger than the sum of its proper divisors (1).

98447681 is an equidigital number, since it uses as much as digits as its factorization.

98447681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The square root of 98447681 is about 9922.0804773999. The cubic root of 98447681 is about 461.7446053185.

The spelling of 98447681 in words is "ninety-eight million, four hundred forty-seven thousand, six hundred eighty-one".