98316721 has 2 divisors, whose sum is σ = 98316722. Its totient is φ = 98316720.

The previous prime is 98316649. The next prime is 98316739. The reversal of 98316721 is 12761389.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86490000 + 11826721 = 9300^2 + 3439^2 .

It is a cyclic number.

It is not a de Polignac number, because 98316721 - 2⁹ = 98316209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98316521) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49158360 + 49158361.

It is an arithmetic number, because the mean of its divisors is an integer number (49158361).

Almost surely, 2^98316721 is an apocalyptic number.

It is an amenable number.

98316721 is a deficient number, since it is larger than the sum of its proper divisors (1).

98316721 is an equidigital number, since it uses as much as digits as its factorization.

98316721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 98316721 is about 9915.4788588348. The cubic root of 98316721 is about 461.5397692534.

The spelling of 98316721 in words is "ninety-eight million, three hundred sixteen thousand, seven hundred twenty-one".