989829469 has 2 divisors, whose sum is σ = 989829470. Its totient is φ = 989829468.

The previous prime is 989829409. The next prime is 989829481. The reversal of 989829469 is 964928989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 900300025 + 89529444 = 30005^2 + 9462^2 .

It is a cyclic number.

It is not a de Polignac number, because 989829469 - 2¹⁵ = 989796701 is a prime.

It is a super-2 number, since 2×989829469² = 1959524755401643922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 989829469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989829409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494914734 + 494914735.

It is an arithmetic number, because the mean of its divisors is an integer number (494914735).

Almost surely, 2^989829469 is an apocalyptic number.

It is an amenable number.

989829469 is a deficient number, since it is larger than the sum of its proper divisors (1).

989829469 is an equidigital number, since it uses as much as digits as its factorization.

989829469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20155392, while the sum is 64.

The square root of 989829469 is about 31461.5554129163. Note that the first 3 decimals coincide. The cubic root of 989829469 is about 996.5982643157.

The spelling of 989829469 in words is "nine hundred eighty-nine million, eight hundred twenty-nine thousand, four hundred sixty-nine".