518458987 has 2 divisors, whose sum is σ = 518458988. Its totient is φ = 518458986.

The previous prime is 518458933. The next prime is 518459003. The reversal of 518458987 is 789854815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 518458987 - 2⁷ = 518458859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (518458487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259229493 + 259229494.

It is an arithmetic number, because the mean of its divisors is an integer number (259229494).

Almost surely, 2^518458987 is an apocalyptic number.

518458987 is a deficient number, since it is larger than the sum of its proper divisors (1).

518458987 is an equidigital number, since it uses as much as digits as its factorization.

518458987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 55.

The square root of 518458987 is about 22769.6944863123. The cubic root of 518458987 is about 803.3500079565.

The spelling of 518458987 in words is "five hundred eighteen million, four hundred fifty-eight thousand, nine hundred eighty-seven".