98811809 has 2 divisors, whose sum is σ = 98811810. Its totient is φ = 98811808.

The previous prime is 98811773. The next prime is 98811829. The reversal of 98811809 is 90811889.

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., 98704225 + 107584 = 9935^2 + 328^2 .

It is a cyclic number.

It is not a de Polignac number, because 98811809 - 2⁸ = 98811553 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 98811809.

It is not a weakly prime, because it can be changed into another prime (98811829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49405904 + 49405905.

It is an arithmetic number, because the mean of its divisors is an integer number (49405905).

Almost surely, 2^98811809 is an apocalyptic number.

It is an amenable number.

98811809 is a deficient number, since it is larger than the sum of its proper divisors (1).

98811809 is an equidigital number, since it uses as much as digits as its factorization.

98811809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 98811809 is about 9940.4129189888. The cubic root of 98811809 is about 462.3131891271.

The spelling of 98811809 in words is "ninety-eight million, eight hundred eleven thousand, eight hundred nine".