998453 has 4 divisors (see below), whose sum is σ = 1041888. Its totient is φ = 955020.

The previous prime is 998443. The next prime is 998471. The reversal of 998453 is 354899.

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: 354899 = 67 ⋅5297.

It is a cyclic number.

It is not a de Polignac number, because 998453 - 2⁸ = 998197 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998423) 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, 21683 + ... + 21728.

It is an arithmetic number, because the mean of its divisors is an integer number (260472).

2⁹⁹⁸⁴⁵³ is an apocalyptic number.

It is an amenable number.

998453 is a deficient number, since it is larger than the sum of its proper divisors (43435).

998453 is a wasteful number, since it uses less digits than its factorization.

998453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43434.

The product of its digits is 38880, while the sum is 38.

The square root of 998453 is about 999.2262006173. The cubic root of 998453 is about 99.9484067192.

The spelling of 998453 in words is "nine hundred ninety-eight thousand, four hundred fifty-three".