98550409 has 2 divisors, whose sum is σ = 98550410. Its totient is φ = 98550408.

The previous prime is 98550407. The next prime is 98550421. The reversal of 98550409 is 90405589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78943225 + 19607184 = 8885^2 + 4428^2 .

It is a cyclic number.

It is not a de Polignac number, because 98550409 - 2¹ = 98550407 is a prime.

It is a super-2 number, since 2×98550409² = 19424366228134562, which contains 22 as substring.

Together with 98550407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (98550407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49275204 + 49275205.

It is an arithmetic number, because the mean of its divisors is an integer number (49275205).

Almost surely, 2^98550409 is an apocalyptic number.

It is an amenable number.

98550409 is a deficient number, since it is larger than the sum of its proper divisors (1).

98550409 is an equidigital number, since it uses as much as digits as its factorization.

98550409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 98550409 is about 9927.2558645378. The cubic root of 98550409 is about 461.9051562835.

The spelling of 98550409 in words is "ninety-eight million, five hundred fifty thousand, four hundred nine".