523004987 has 2 divisors, whose sum is σ = 523004988. Its totient is φ = 523004986.

The previous prime is 523004971. The next prime is 523005031. The reversal of 523004987 is 789400325.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 523004987 - 2⁴ = 523004971 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 523004987.

It is not a weakly prime, because it can be changed into another prime (523004927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261502493 + 261502494.

It is an arithmetic number, because the mean of its divisors is an integer number (261502494).

Almost surely, 2^523004987 is an apocalyptic number.

523004987 is a deficient number, since it is larger than the sum of its proper divisors (1).

523004987 is an equidigital number, since it uses as much as digits as its factorization.

523004987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 523004987 is about 22869.3022849408. The cubic root of 523004987 is about 805.6911811265.

The spelling of 523004987 in words is "five hundred twenty-three million, four thousand, nine hundred eighty-seven".