989427 has 8 divisors (see below), whose sum is σ = 1361920. Its totient is φ = 638280.

The previous prime is 989423. The next prime is 989441. The reversal of 989427 is 724989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 989427 - 2² = 989423 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (989423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5227 + ... + 5412.

It is an arithmetic number, because the mean of its divisors is an integer number (170240).

2⁹⁸⁹⁴²⁷ is an apocalyptic number.

989427 is a deficient number, since it is larger than the sum of its proper divisors (372493).

989427 is a wasteful number, since it uses less digits than its factorization.

989427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10673.

The product of its digits is 36288, while the sum is 39.

The square root of 989427 is about 994.6994520960. The cubic root of 989427 is about 99.6463172264.

The spelling of 989427 in words is "nine hundred eighty-nine thousand, four hundred twenty-seven".