98661289 has 2 divisors, whose sum is σ = 98661290. Its totient is φ = 98661288.

The previous prime is 98661271. The next prime is 98661337. The reversal of 98661289 is 98216689.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82500889 + 16160400 = 9083^2 + 4020^2 .

It is a cyclic number.

It is not a de Polignac number, because 98661289 - 2⁵ = 98661257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98661239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49330644 + 49330645.

It is an arithmetic number, because the mean of its divisors is an integer number (49330645).

Almost surely, 2^98661289 is an apocalyptic number.

It is an amenable number.

98661289 is a deficient number, since it is larger than the sum of its proper divisors (1).

98661289 is an equidigital number, since it uses as much as digits as its factorization.

98661289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 49.

The square root of 98661289 is about 9932.8389194631. The cubic root of 98661289 is about 462.0783226470.

The spelling of 98661289 in words is "ninety-eight million, six hundred sixty-one thousand, two hundred eighty-nine".