989669 has 8 divisors (see below), whose sum is σ = 1026432. Its totient is φ = 953680.

The previous prime is 989663. The next prime is 989671. The reversal of 989669 is 966989.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989669 is a prime.

It is a super-2 number, since 2×989669² = 1958889459122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989663) 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, 3632 + ... + 3894.

It is an arithmetic number, because the mean of its divisors is an integer number (128304).

2⁹⁸⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

989669 is a deficient number, since it is larger than the sum of its proper divisors (36763).

989669 is a wasteful number, since it uses less digits than its factorization.

989669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387.

The product of its digits is 209952, while the sum is 47.

The square root of 989669 is about 994.8210894427. The cubic root of 989669 is about 99.6544405958.

The spelling of 989669 in words is "nine hundred eighty-nine thousand, six hundred sixty-nine".