998487 has 24 divisors (see below), whose sum is σ = 1712256. Its totient is φ = 569592.

The previous prime is 998471. The next prime is 998497. The reversal of 998487 is 784899.

It is not a de Polignac number, because 998487 - 2⁴ = 998471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998497) 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 23 ways as a sum of consecutive naturals, for example, 1408 + ... + 1994.

It is an arithmetic number, because the mean of its divisors is an integer number (71344).

2⁹⁹⁸⁴⁸⁷ is an apocalyptic number.

998487 is a deficient number, since it is larger than the sum of its proper divisors (713769).

998487 is an equidigital number, since it uses as much as digits as its factorization.

998487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 597 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 998487 is about 999.2432136372. The cubic root of 998487 is about 99.9495412101.

It can be divided in two parts, 998 and 487, that added together give a triangular number (1485 = T₅₄).

The spelling of 998487 in words is "nine hundred ninety-eight thousand, four hundred eighty-seven".