523424309 has 2 divisors, whose sum is σ = 523424310. Its totient is φ = 523424308.

The previous prime is 523424287. The next prime is 523424329. The reversal of 523424309 is 903424325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424978225 + 98446084 = 20615^2 + 9922^2 .

It is a cyclic number.

It is not a de Polignac number, because 523424309 - 2⁸ = 523424053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523424329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261712154 + 261712155.

It is an arithmetic number, because the mean of its divisors is an integer number (261712155).

Almost surely, 2^523424309 is an apocalyptic number.

It is an amenable number.

523424309 is a deficient number, since it is larger than the sum of its proper divisors (1).

523424309 is an equidigital number, since it uses as much as digits as its factorization.

523424309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 523424309 is about 22878.4682398101. The cubic root of 523424309 is about 805.9064459880.

The spelling of 523424309 in words is "five hundred twenty-three million, four hundred twenty-four thousand, three hundred nine".