98988809 has 2 divisors, whose sum is σ = 98988810. Its totient is φ = 98988808.

The previous prime is 98988761. The next prime is 98988821. The reversal of 98988809 is 90888989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96098809 + 2890000 = 9803^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 98988809 - 2⁸ = 98988553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98988829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49494404 + 49494405.

It is an arithmetic number, because the mean of its divisors is an integer number (49494405).

Almost surely, 2^98988809 is an apocalyptic number.

It is an amenable number.

98988809 is a deficient number, since it is larger than the sum of its proper divisors (1).

98988809 is an equidigital number, since it uses as much as digits as its factorization.

98988809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 59.

The square root of 98988809 is about 9949.3119862632. The cubic root of 98988809 is about 462.5890691862.

It can be divided in two parts, 989 and 88809, that added together give a palindrome (89798).

The spelling of 98988809 in words is "ninety-eight million, nine hundred eighty-eight thousand, eight hundred nine".