523340399 has 4 divisors (see below), whose sum is σ = 523394040. Its totient is φ = 523286760.

The previous prime is 523340387. The next prime is 523340407. The reversal of 523340399 is 993043325.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 523340399 - 2⁴ = 523340383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523340329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7589 + ... + 33230.

It is an arithmetic number, because the mean of its divisors is an integer number (130848510).

Almost surely, 2^523340399 is an apocalyptic number.

523340399 is a deficient number, since it is larger than the sum of its proper divisors (53641).

523340399 is a wasteful number, since it uses less digits than its factorization.

523340399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53640.

The product of its (nonzero) digits is 87480, while the sum is 38.

The square root of 523340399 is about 22876.6343459872. The cubic root of 523340399 is about 805.8633788099.

The spelling of 523340399 in words is "five hundred twenty-three million, three hundred forty thousand, three hundred ninety-nine".