98020009 has 2 divisors, whose sum is σ = 98020010. Its totient is φ = 98020008.

The previous prime is 98019991. The next prime is 98020033. The reversal of 98020009 is 90002089.

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., 83174400 + 14845609 = 9120^2 + 3853^2 .

It is an emirp because it is prime and its reverse (90002089) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98020009 - 2¹¹ = 98017961 is a prime.

It is not a weakly prime, because it can be changed into another prime (98020049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49010004 + 49010005.

It is an arithmetic number, because the mean of its divisors is an integer number (49010005).

Almost surely, 2^98020009 is an apocalyptic number.

It is an amenable number.

98020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

98020009 is an equidigital number, since it uses as much as digits as its factorization.

98020009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 98020009 is about 9900.5054921453. The cubic root of 98020009 is about 461.0750046964.

The spelling of 98020009 in words is "ninety-eight million, twenty thousand, nine".