398174923 has 4 divisors (see below), whose sum is σ = 403629448. Its totient is φ = 392720400.

The previous prime is 398174911. The next prime is 398174951. The reversal of 398174923 is 329471893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398174923 - 2²¹ = 396077771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398174993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2727153 + ... + 2727298.

It is an arithmetic number, because the mean of its divisors is an integer number (100907362).

Almost surely, 2^398174923 is an apocalyptic number.

398174923 is a deficient number, since it is larger than the sum of its proper divisors (5454525).

398174923 is an equidigital number, since it uses as much as digits as its factorization.

398174923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5454524.

The product of its digits is 326592, while the sum is 46.

The square root of 398174923 is about 19954.3209105196. The cubic root of 398174923 is about 735.6839842073.

The spelling of 398174923 in words is "three hundred ninety-eight million, one hundred seventy-four thousand, nine hundred twenty-three".