340523 has 4 divisors (see below), whose sum is σ = 342240. Its totient is φ = 338808.

The previous prime is 340519. The next prime is 340541. The reversal of 340523 is 325043.

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 340523 - 2² = 340519 is a prime.

It is a d-powerful number, because it can be written as 3⁹ + 4⁸ + 5⁷ + 0 + 2⁵ + 3¹¹ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340573) 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, 515 + ... + 972.

It is an arithmetic number, because the mean of its divisors is an integer number (85560).

2³⁴⁰⁵²³ is an apocalyptic number.

340523 is a deficient number, since it is larger than the sum of its proper divisors (1717).

340523 is a wasteful number, since it uses less digits than its factorization.

340523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 340523 is about 583.5434859546. The cubic root of 340523 is about 69.8310893435.

Adding to 340523 its reverse (325043), we get a palindrome (665566).

The spelling of 340523 in words is "three hundred forty thousand, five hundred twenty-three".