398553 has 4 divisors (see below), whose sum is σ = 531408. Its totient is φ = 265700.

The previous prime is 398549. The next prime is 398557. The reversal of 398553 is 355893.

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.

It is an interprime number because it is at equal distance from previous prime (398549) and next prime (398557).

It is a cyclic number.

It is not a de Polignac number, because 398553 - 2² = 398549 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (398557) 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, 66423 + ... + 66428.

It is an arithmetic number, because the mean of its divisors is an integer number (132852).

2³⁹⁸⁵⁵³ is an apocalyptic number.

It is an amenable number.

398553 is a deficient number, since it is larger than the sum of its proper divisors (132855).

398553 is a wasteful number, since it uses less digits than its factorization.

398553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132854.

The product of its digits is 16200, while the sum is 33.

The square root of 398553 is about 631.3105416513. The cubic root of 398553 is about 73.5916760632.

The spelling of 398553 in words is "three hundred ninety-eight thousand, five hundred fifty-three".