998769 has 8 divisors (see below), whose sum is σ = 1351840. Its totient is φ = 655776.

The previous prime is 998759. The next prime is 998779. The reversal of 998769 is 967899.

998769 = 227² + 228² + ... + 244².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (998759) and next prime (998779).

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

It is not a de Polignac number, because 998769 - 2⁵ = 998737 is a prime.

It is a super-2 number, since 2×998769² = 1995079030722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998769.

It is not an unprimeable number, because it can be changed into a prime (998749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2284 + ... + 2685.

It is an arithmetic number, because the mean of its divisors is an integer number (168980).

2⁹⁹⁸⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

998769 is a deficient number, since it is larger than the sum of its proper divisors (353071).

998769 is a wasteful number, since it uses less digits than its factorization.

998769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5039.

The product of its digits is 244944, while the sum is 48.

The square root of 998769 is about 999.3843104632. The cubic root of 998769 is about 99.9589498178.

The spelling of 998769 in words is "nine hundred ninety-eight thousand, seven hundred sixty-nine".