523418 has 20 divisors (see below), whose sum is σ = 924330. Its totient is φ = 222264.

The previous prime is 523417. The next prime is 523427. The reversal of 523418 is 814325.

It can be written as a sum of positive squares in only one way, i.e., 405769 + 117649 = 637^2 + 343^2 .

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 523393 and 523402.

It is not an unprimeable number, because it can be changed into a prime (523417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4748 + ... + 4856.

2⁵²³⁴¹⁸ is an apocalyptic number.

523418 is a deficient number, since it is larger than the sum of its proper divisors (400912).

523418 is an equidigital number, since it uses as much as digits as its factorization.

523418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 118 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 523418 is about 723.4763299514. The cubic root of 523418 is about 80.5903208026.

The spelling of 523418 in words is "five hundred twenty-three thousand, four hundred eighteen".