987898789 has 2 divisors, whose sum is σ = 987898790. Its totient is φ = 987898788.

The previous prime is 987898763. The next prime is 987898811.

987898789 is nontrivially palindromic in base 10.

987898789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

987898789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 557668225 + 430230564 = 23615^2 + 20742^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 987898789 - 2⁷ = 987898661 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987898729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493949394 + 493949395.

It is an arithmetic number, because the mean of its divisors is an integer number (493949395).

Almost surely, 2^987898789 is an apocalyptic number.

It is an amenable number.

987898789 is a deficient number, since it is larger than the sum of its proper divisors (1).

987898789 is an equidigital number, since it uses as much as digits as its factorization.

987898789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 146313216, while the sum is 73.

The square root of 987898789 is about 31430.8572743411. The cubic root of 987898789 is about 995.9498816870.

The spelling of 987898789 in words is "nine hundred eighty-seven million, eight hundred ninety-eight thousand, seven hundred eighty-nine".