398329 has 4 divisors (see below), whose sum is σ = 399760. Its totient is φ = 396900.

The previous prime is 398323. The next prime is 398339. The reversal of 398329 is 923893.

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: 923893 = 31 ⋅29803.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398294 and 398303.

It is not an unprimeable number, because it can be changed into a prime (398323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147 + ... + 904.

It is an arithmetic number, because the mean of its divisors is an integer number (99940).

2³⁹⁸³²⁹ is an apocalyptic number.

It is an amenable number.

398329 is a deficient number, since it is larger than the sum of its proper divisors (1431).

398329 is a wasteful number, since it uses less digits than its factorization.

398329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430.

The product of its digits is 11664, while the sum is 34.

The square root of 398329 is about 631.1331079891. The cubic root of 398329 is about 73.5778864922.

It can be divided in two parts, 398 and 329, that added together give a palindrome (727).

The spelling of 398329 in words is "three hundred ninety-eight thousand, three hundred twenty-nine".