998577 has 12 divisors (see below), whose sum is σ = 1452724. Its totient is φ = 660960.

The previous prime is 998561. The next prime is 998617. The reversal of 998577 is 775899.

It can be written as a sum of positive squares in 2 ways, for example, as 6561 + 992016 = 81^2 + 996^2 .

It is not a de Polignac number, because 998577 - 2⁴ = 998561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1323 + ... + 1935.

2⁹⁹⁸⁵⁷⁷ is an apocalyptic number.

It is an amenable number.

998577 is a deficient number, since it is larger than the sum of its proper divisors (454147).

998577 is a wasteful number, since it uses less digits than its factorization.

998577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 797 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 998577 is about 999.2882467036. The cubic root of 998577 is about 99.9525441497.

The spelling of 998577 in words is "nine hundred ninety-eight thousand, five hundred seventy-seven".