398523 has 8 divisors (see below), whose sum is σ = 539136. Its totient is φ = 261800.

The previous prime is 398509. The next prime is 398539. The reversal of 398523 is 325893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398523 - 2⁵ = 398491 is a prime.

398523 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (398543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723 + ... + 1148.

It is an arithmetic number, because the mean of its divisors is an integer number (67392).

2³⁹⁸⁵²³ is an apocalyptic number.

398523 is a deficient number, since it is larger than the sum of its proper divisors (140613).

398523 is a wasteful number, since it uses less digits than its factorization.

398523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945.

The product of its digits is 6480, while the sum is 30.

The square root of 398523 is about 631.2867811067. The cubic root of 398523 is about 73.5898295453.

The spelling of 398523 in words is "three hundred ninety-eight thousand, five hundred twenty-three".