989440429 has 2 divisors, whose sum is σ = 989440430. Its totient is φ = 989440428.

The previous prime is 989440391. The next prime is 989440483. The reversal of 989440429 is 924044989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513022500 + 476417929 = 22650^2 + 21827^2 .

It is a cyclic number.

It is not a de Polignac number, because 989440429 - 2⁹ = 989439917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989440489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494720214 + 494720215.

It is an arithmetic number, because the mean of its divisors is an integer number (494720215).

Almost surely, 2^989440429 is an apocalyptic number.

It is an amenable number.

989440429 is a deficient number, since it is larger than the sum of its proper divisors (1).

989440429 is an equidigital number, since it uses as much as digits as its factorization.

989440429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 989440429 is about 31455.3720213257. The cubic root of 989440429 is about 996.4676804096.

The spelling of 989440429 in words is "nine hundred eighty-nine million, four hundred forty thousand, four hundred twenty-nine".