343440523 has 4 divisors (see below), whose sum is σ = 361516360. Its totient is φ = 325364688.

The previous prime is 343440499. The next prime is 343440529. The reversal of 343440523 is 325044343.

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 343440523 - 2⁵ = 343440491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 343440491 and 343440500.

It is not an unprimeable number, because it can be changed into a prime (343440529) 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, 9037890 + ... + 9037927.

It is an arithmetic number, because the mean of its divisors is an integer number (90379090).

Almost surely, 2^343440523 is an apocalyptic number.

343440523 is a deficient number, since it is larger than the sum of its proper divisors (18075837).

343440523 is a wasteful number, since it uses less digits than its factorization.

343440523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18075836.

The product of its (nonzero) digits is 17280, while the sum is 28.

The square root of 343440523 is about 18532.1483643964. The cubic root of 343440523 is about 700.2995473082.

Adding to 343440523 its reverse (325044343), we get a palindrome (668484866).

The spelling of 343440523 in words is "three hundred forty-three million, four hundred forty thousand, five hundred twenty-three".