518670449 has 4 divisors (see below), whose sum is σ = 565822320. Its totient is φ = 471518580.

The previous prime is 518670431. The next prime is 518670469. The reversal of 518670449 is 944076815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 518670449 - 2⁸ = 518670193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518670469) 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, 23575919 + ... + 23575940.

It is an arithmetic number, because the mean of its divisors is an integer number (141455580).

Almost surely, 2^518670449 is an apocalyptic number.

It is an amenable number.

518670449 is a deficient number, since it is larger than the sum of its proper divisors (47151871).

518670449 is a wasteful number, since it uses less digits than its factorization.

518670449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47151870.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 518670449 is about 22774.3375095742. The cubic root of 518670449 is about 803.4592129357.

The spelling of 518670449 in words is "five hundred eighteen million, six hundred seventy thousand, four hundred forty-nine".