398499 has 4 divisors (see below), whose sum is σ = 531336. Its totient is φ = 265664.

The previous prime is 398491. The next prime is 398509. The reversal of 398499 is 994893.

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 398499 - 2³ = 398491 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 398499.

It is not an unprimeable number, because it can be changed into a prime (398491) 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, 66414 + ... + 66419.

It is an arithmetic number, because the mean of its divisors is an integer number (132834).

2³⁹⁸⁴⁹⁹ is an apocalyptic number.

398499 is a deficient number, since it is larger than the sum of its proper divisors (132837).

398499 is a wasteful number, since it uses less digits than its factorization.

398499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132836.

The product of its digits is 69984, while the sum is 42.

The square root of 398499 is about 631.2677720271. The cubic root of 398499 is about 73.5883522644.

The spelling of 398499 in words is "three hundred ninety-eight thousand, four hundred ninety-nine".