998477 has 4 divisors (see below), whose sum is σ = 1001280. Its totient is φ = 995676.

The previous prime is 998471. The next prime is 998497. The reversal of 998477 is 774899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 774899 = 827 ⋅937.

It is a cyclic number.

It is not a de Polignac number, because 998477 - 2¹⁰ = 997453 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 (998471) 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, 773 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (250320).

2⁹⁹⁸⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

998477 is a deficient number, since it is larger than the sum of its proper divisors (2803).

998477 is a wasteful number, since it uses less digits than its factorization.

998477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802.

The product of its digits is 127008, while the sum is 44.

The square root of 998477 is about 999.2382098379. The cubic root of 998477 is about 99.9492075390.

The spelling of 998477 in words is "nine hundred ninety-eight thousand, four hundred seventy-seven".