518340139 has 2 divisors, whose sum is σ = 518340140. Its totient is φ = 518340138.

The previous prime is 518340133. The next prime is 518340169. The reversal of 518340139 is 931043815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 518340139 - 2³ = 518340131 is a prime.

It is not a weakly prime, because it can be changed into another prime (518340131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259170069 + 259170070.

It is an arithmetic number, because the mean of its divisors is an integer number (259170070).

Almost surely, 2^518340139 is an apocalyptic number.

518340139 is a deficient number, since it is larger than the sum of its proper divisors (1).

518340139 is an equidigital number, since it uses as much as digits as its factorization.

518340139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 518340139 is about 22767.0845520457. The cubic root of 518340139 is about 803.2886184409.

The spelling of 518340139 in words is "five hundred eighteen million, three hundred forty thousand, one hundred thirty-nine".