523505447 has 2 divisors, whose sum is σ = 523505448. Its totient is φ = 523505446.

The previous prime is 523505443. The next prime is 523505449. The reversal of 523505447 is 744505325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523505447 - 2² = 523505443 is a prime.

Together with 523505449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523505443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261752723 + 261752724.

It is an arithmetic number, because the mean of its divisors is an integer number (261752724).

Almost surely, 2^523505447 is an apocalyptic number.

523505447 is a deficient number, since it is larger than the sum of its proper divisors (1).

523505447 is an equidigital number, since it uses as much as digits as its factorization.

523505447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84000, while the sum is 35.

The square root of 523505447 is about 22880.2414104397. The cubic root of 523505447 is about 805.9480860479.

The spelling of 523505447 in words is "five hundred twenty-three million, five hundred five thousand, four hundred forty-seven".