523238407 has 2 divisors, whose sum is σ = 523238408. Its totient is φ = 523238406.

The previous prime is 523238369. The next prime is 523238411. The reversal of 523238407 is 704832325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523238407 - 2⁷ = 523238279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523238447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261619203 + 261619204.

It is an arithmetic number, because the mean of its divisors is an integer number (261619204).

Almost surely, 2^523238407 is an apocalyptic number.

523238407 is a deficient number, since it is larger than the sum of its proper divisors (1).

523238407 is an equidigital number, since it uses as much as digits as its factorization.

523238407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 523238407 is about 22874.4050633016. The cubic root of 523238407 is about 805.8110247667.

The spelling of 523238407 in words is "five hundred twenty-three million, two hundred thirty-eight thousand, four hundred seven".