98968021 has 2 divisors, whose sum is σ = 98968022. Its totient is φ = 98968020.

The previous prime is 98968019. The next prime is 98968061. The reversal of 98968021 is 12086989.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98287396 + 680625 = 9914^2 + 825^2 .

It is a cyclic number.

It is not a de Polignac number, because 98968021 - 2¹ = 98968019 is a prime.

Together with 98968019, 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 (98968061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49484010 + 49484011.

It is an arithmetic number, because the mean of its divisors is an integer number (49484011).

Almost surely, 2^98968021 is an apocalyptic number.

It is an amenable number.

98968021 is a deficient number, since it is larger than the sum of its proper divisors (1).

98968021 is an equidigital number, since it uses as much as digits as its factorization.

98968021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 98968021 is about 9948.2672360567. The cubic root of 98968021 is about 462.5566851389.

The spelling of 98968021 in words is "ninety-eight million, nine hundred sixty-eight thousand, twenty-one".