988569 has 6 divisors (see below), whose sum is σ = 1427946. Its totient is φ = 659040.

The previous prime is 988549. The next prime is 988571. The reversal of 988569 is 965889.

988569 is a `hidden beast` number, since 9 + 88 + 569 = 666.

It can be written as a sum of positive squares in only one way, i.e., 974169 + 14400 = 987^2 + 120^2 .

It is not a de Polignac number, because 988569 - 2⁸ = 988313 is a prime.

It is a super-2 number, since 2×988569² = 1954537335522, which contains 22 as substring.

It is a Curzon number.

988569 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 988569.

It is not an unprimeable number, because it can be changed into a prime (988549) 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 in 5 ways as a sum of consecutive naturals, for example, 54912 + ... + 54929.

It is an arithmetic number, because the mean of its divisors is an integer number (237991).

2⁹⁸⁸⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

988569 is a deficient number, since it is larger than the sum of its proper divisors (439377).

988569 is a wasteful number, since it uses less digits than its factorization.

988569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109847 (or 109844 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 988569 is about 994.2680725036. The cubic root of 988569 is about 99.6175055117.

The spelling of 988569 in words is "nine hundred eighty-eight thousand, five hundred sixty-nine".