989423 has 2 divisors, whose sum is σ = 989424. Its totient is φ = 989422.

The previous prime is 989419. The next prime is 989441. The reversal of 989423 is 324989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989423 - 2² = 989419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989123) 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, 494711 + 494712.

It is an arithmetic number, because the mean of its divisors is an integer number (494712).

2⁹⁸⁹⁴²³ is an apocalyptic number.

989423 is a deficient number, since it is larger than the sum of its proper divisors (1).

989423 is an equidigital number, since it uses as much as digits as its factorization.

989423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 989423 is about 994.6974414363. The cubic root of 989423 is about 99.6461829447.

The spelling of 989423 in words is "nine hundred eighty-nine thousand, four hundred twenty-three".