998523 has 6 divisors (see below), whose sum is σ = 1442324. Its totient is φ = 665676.

The previous prime is 998513. The next prime is 998527. The reversal of 998523 is 325899.

It is not a de Polignac number, because 998523 - 2¹³ = 990331 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 55465 + ... + 55482.

2⁹⁹⁸⁵²³ is an apocalyptic number.

998523 is a deficient number, since it is larger than the sum of its proper divisors (443801).

998523 is a wasteful number, since it uses less digits than its factorization.

998523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110953 (or 110950 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 998523 is about 999.2612271073. The cubic root of 998523 is about 99.9507424075.

It can be divided in two parts, 998 and 523, that added together give a square (1521 = 39²).

The spelling of 998523 in words is "nine hundred ninety-eight thousand, five hundred twenty-three".