989479 has 2 divisors, whose sum is σ = 989480. Its totient is φ = 989478.

The previous prime is 989477. The next prime is 989507. The reversal of 989479 is 974989.

It is a weak prime.

It is an emirp because it is prime and its reverse (974989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989479 - 2¹ = 989477 is a prime.

Together with 989477, it forms a pair of twin primes.

989479 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494739 + 494740.

It is an arithmetic number, because the mean of its divisors is an integer number (494740).

2⁹⁸⁹⁴⁷⁹ is an apocalyptic number.

989479 is a deficient number, since it is larger than the sum of its proper divisors (1).

989479 is an equidigital number, since it uses as much as digits as its factorization.

989479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 989479 is about 994.7255903012. The cubic root of 989479 is about 99.6480628555.

The spelling of 989479 in words is "nine hundred eighty-nine thousand, four hundred seventy-nine".