518130739 has 4 divisors (see below), whose sum is σ = 592149424. Its totient is φ = 444112056.

The previous prime is 518130731. The next prime is 518130749. The reversal of 518130739 is 937031815.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937031815 = 5 ⋅187406363.

It is a cyclic number.

It is not a de Polignac number, because 518130739 - 2³ = 518130731 is a prime.

It is a super-2 number, since 2×518130739² = 536918925393372242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 518130698 and 518130707.

It is not an unprimeable number, because it can be changed into a prime (518130731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37009332 + ... + 37009345.

It is an arithmetic number, because the mean of its divisors is an integer number (148037356).

Almost surely, 2^518130739 is an apocalyptic number.

518130739 is a deficient number, since it is larger than the sum of its proper divisors (74018685).

518130739 is an equidigital number, since it uses as much as digits as its factorization.

518130739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74018684.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 518130739 is about 22762.4853432133. The cubic root of 518130739 is about 803.1804325348.

The spelling of 518130739 in words is "five hundred eighteen million, one hundred thirty thousand, seven hundred thirty-nine".