518649293 has 2 divisors, whose sum is σ = 518649294. Its totient is φ = 518649292.

The previous prime is 518649283. The next prime is 518649317. The reversal of 518649293 is 392946815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512705449 + 5943844 = 22643^2 + 2438^2 .

It is a cyclic number.

It is not a de Polignac number, because 518649293 - 2⁸ = 518649037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518649233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259324646 + 259324647.

It is an arithmetic number, because the mean of its divisors is an integer number (259324647).

Almost surely, 2^518649293 is an apocalyptic number.

It is an amenable number.

518649293 is a deficient number, since it is larger than the sum of its proper divisors (1).

518649293 is an equidigital number, since it uses as much as digits as its factorization.

518649293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The square root of 518649293 is about 22773.8730346860. The cubic root of 518649293 is about 803.4482887132.

The spelling of 518649293 in words is "five hundred eighteen million, six hundred forty-nine thousand, two hundred ninety-three".