98535821 has 2 divisors, whose sum is σ = 98535822. Its totient is φ = 98535820.

The previous prime is 98535817. The next prime is 98535839. The reversal of 98535821 is 12853589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96255721 + 2280100 = 9811^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 98535821 - 2² = 98535817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98535421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49267910 + 49267911.

It is an arithmetic number, because the mean of its divisors is an integer number (49267911).

Almost surely, 2^98535821 is an apocalyptic number.

It is an amenable number.

98535821 is a deficient number, since it is larger than the sum of its proper divisors (1).

98535821 is an equidigital number, since it uses as much as digits as its factorization.

98535821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 41.

The square root of 98535821 is about 9926.5210925077. The cubic root of 98535821 is about 461.8823638703.

The spelling of 98535821 in words is "ninety-eight million, five hundred thirty-five thousand, eight hundred twenty-one".