523027409 has 2 divisors, whose sum is σ = 523027410. Its totient is φ = 523027408.

The previous prime is 523027403. The next prime is 523027411. The reversal of 523027409 is 904720325.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497423809 + 25603600 = 22303^2 + 5060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523027409 is a prime.

Together with 523027411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (523027403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261513704 + 261513705.

It is an arithmetic number, because the mean of its divisors is an integer number (261513705).

Almost surely, 2^523027409 is an apocalyptic number.

It is an amenable number.

523027409 is a deficient number, since it is larger than the sum of its proper divisors (1).

523027409 is an equidigital number, since it uses as much as digits as its factorization.

523027409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 523027409 is about 22869.7925001518. The cubic root of 523027409 is about 805.7026946876.

The spelling of 523027409 in words is "five hundred twenty-three million, twenty-seven thousand, four hundred nine".