989969 has 4 divisors (see below), whose sum is σ = 1006260. Its totient is φ = 973680.

The previous prime is 989959. The next prime is 989971. The reversal of 989969 is 969989.

989969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 506944 + 483025 = 712^2 + 695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989969 is a prime.

It is a super-2 number, since 2×989969² = 1960077241922, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989969.

It is not an unprimeable number, because it can be changed into a prime (989909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8054 + ... + 8175.

It is an arithmetic number, because the mean of its divisors is an integer number (251565).

2⁹⁸⁹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

989969 is a deficient number, since it is larger than the sum of its proper divisors (16291).

989969 is a wasteful number, since it uses less digits than its factorization.

989969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16290.

The product of its digits is 314928, while the sum is 50.

The square root of 989969 is about 994.9718588985. The cubic root of 989969 is about 99.6645090503.

The spelling of 989969 in words is "nine hundred eighty-nine thousand, nine hundred sixty-nine".