789698989 has 2 divisors, whose sum is σ = 789698990. Its totient is φ = 789698988.

The previous prime is 789698963. The next prime is 789699007. The reversal of 789698989 is 989896987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 622901764 + 166797225 = 24958^2 + 12915^2 .

It is an emirp because it is prime and its reverse (989896987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 789698989 - 2¹⁷ = 789567917 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 (789696989) 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, 394849494 + 394849495.

It is an arithmetic number, because the mean of its divisors is an integer number (394849495).

Almost surely, 2^789698989 is an apocalyptic number.

It is an amenable number.

789698989 is a deficient number, since it is larger than the sum of its proper divisors (1).

789698989 is an equidigital number, since it uses as much as digits as its factorization.

789698989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141087744, while the sum is 73.

The square root of 789698989 is about 28101.5833895530. The cubic root of 789698989 is about 924.3161203706.

The spelling of 789698989 in words is "seven hundred eighty-nine million, six hundred ninety-eight thousand, nine hundred eighty-nine".