98865409 has 2 divisors, whose sum is σ = 98865410. Its totient is φ = 98865408.

The previous prime is 98865343. The next prime is 98865449. The reversal of 98865409 is 90456889.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96530625 + 2334784 = 9825^2 + 1528^2 .

It is an emirp because it is prime and its reverse (90456889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98865409 - 2⁷ = 98865281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98865449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49432704 + 49432705.

It is an arithmetic number, because the mean of its divisors is an integer number (49432705).

Almost surely, 2^98865409 is an apocalyptic number.

It is an amenable number.

98865409 is a deficient number, since it is larger than the sum of its proper divisors (1).

98865409 is an equidigital number, since it uses as much as digits as its factorization.

98865409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 98865409 is about 9943.1086185358. The cubic root of 98865409 is about 462.3967672201.

The spelling of 98865409 in words is "ninety-eight million, eight hundred sixty-five thousand, four hundred nine".