523640027 has 2 divisors, whose sum is σ = 523640028. Its totient is φ = 523640026.

The previous prime is 523640009. The next prime is 523640081. The reversal of 523640027 is 720046325.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523640027 is a prime.

It is not a weakly prime, because it can be changed into another prime (523640527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261820013 + 261820014.

It is an arithmetic number, because the mean of its divisors is an integer number (261820014).

Almost surely, 2^523640027 is an apocalyptic number.

523640027 is a deficient number, since it is larger than the sum of its proper divisors (1).

523640027 is an equidigital number, since it uses as much as digits as its factorization.

523640027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 523640027 is about 22883.1821869250. The cubic root of 523640027 is about 806.0171430819.

The spelling of 523640027 in words is "five hundred twenty-three million, six hundred forty thousand, twenty-seven".