518849129 has 4 divisors (see below), whose sum is σ = 549369684. Its totient is φ = 488328576.

The previous prime is 518849119. The next prime is 518849143. The reversal of 518849129 is 921948815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 355699600 + 163149529 = 18860^2 + 12773^2 .

It is a cyclic number.

It is not a de Polignac number, because 518849129 - 2⁸ = 518848873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518849119) 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, 15260252 + ... + 15260285.

It is an arithmetic number, because the mean of its divisors is an integer number (137342421).

Almost surely, 2^518849129 is an apocalyptic number.

It is an amenable number.

518849129 is a deficient number, since it is larger than the sum of its proper divisors (30520555).

518849129 is a wasteful number, since it uses less digits than its factorization.

518849129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30520554.

The product of its digits is 207360, while the sum is 47.

The square root of 518849129 is about 22778.2600081745. The cubic root of 518849129 is about 803.5514652256.

The spelling of 518849129 in words is "five hundred eighteen million, eight hundred forty-nine thousand, one hundred twenty-nine".