98415209 has 2 divisors, whose sum is σ = 98415210. Its totient is φ = 98415208.

The previous prime is 98415199. The next prime is 98415217. The reversal of 98415209 is 90251489.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74011609 + 24403600 = 8603^2 + 4940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98415209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (98415259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49207604 + 49207605.

It is an arithmetic number, because the mean of its divisors is an integer number (49207605).

Almost surely, 2^98415209 is an apocalyptic number.

It is an amenable number.

98415209 is a deficient number, since it is larger than the sum of its proper divisors (1).

98415209 is an equidigital number, since it uses as much as digits as its factorization.

98415209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 98415209 is about 9920.4439920802. The cubic root of 98415209 is about 461.6938324292.

The spelling of 98415209 in words is "ninety-eight million, four hundred fifteen thousand, two hundred nine".