518237149 has 2 divisors, whose sum is σ = 518237150. Its totient is φ = 518237148.

The previous prime is 518237131. The next prime is 518237177. The reversal of 518237149 is 941732815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438902500 + 79334649 = 20950^2 + 8907^2 .

It is a cyclic number.

It is not a de Polignac number, because 518237149 - 2⁵ = 518237117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518237249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259118574 + 259118575.

It is an arithmetic number, because the mean of its divisors is an integer number (259118575).

Almost surely, 2^518237149 is an apocalyptic number.

It is an amenable number.

518237149 is a deficient number, since it is larger than the sum of its proper divisors (1).

518237149 is an equidigital number, since it uses as much as digits as its factorization.

518237149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 518237149 is about 22764.8226217557. The cubic root of 518237149 is about 803.2354125963.

The spelling of 518237149 in words is "five hundred eighteen million, two hundred thirty-seven thousand, one hundred forty-nine".