101989289 has 2 divisors, whose sum is σ = 101989290. Its totient is φ = 101989288.

The previous prime is 101989247. The next prime is 101989301. The reversal of 101989289 is 982989101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78145600 + 23843689 = 8840^2 + 4883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101989289 is a prime.

It is not a weakly prime, because it can be changed into another prime (101980289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50994644 + 50994645.

It is an arithmetic number, because the mean of its divisors is an integer number (50994645).

Almost surely, 2^101989289 is an apocalyptic number.

It is an amenable number.

101989289 is a deficient number, since it is larger than the sum of its proper divisors (1).

101989289 is an equidigital number, since it uses as much as digits as its factorization.

101989289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 47.

The square root of 101989289 is about 10098.9746509237. The cubic root of 101989289 is about 467.2165175856.

The spelling of 101989289 in words is "one hundred one million, nine hundred eighty-nine thousand, two hundred eighty-nine".