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494688689 = 1144971699
BaseRepresentation
bin11101011111000…
…101100110110001
31021110211210022022
4131133011212301
52003120014224
6121030521225
715154533035
oct3537054661
91243753268
10494688689
11234269a30
12119806215
137b645701
14499b21c5
152d66965e
hex1d7c59b1

494688689 has 4 divisors (see below), whose sum is σ = 539660400. Its totient is φ = 449716980.

The previous prime is 494688679. The next prime is 494688707. The reversal of 494688689 is 986886494.

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 494688689 - 24 = 494688673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (494688679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22485839 + ... + 22485860.

It is an arithmetic number, because the mean of its divisors is an integer number (134915100).

Almost surely, 2494688689 is an apocalyptic number.

It is an amenable number.

494688689 is a deficient number, since it is larger than the sum of its proper divisors (44971711).

494688689 is a wasteful number, since it uses less digits than its factorization.

494688689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44971710.

The product of its digits is 23887872, while the sum is 62.

The square root of 494688689 is about 22241.5981664987. The cubic root of 494688689 is about 790.8801220324.

The spelling of 494688689 in words is "four hundred ninety-four million, six hundred eighty-eight thousand, six hundred eighty-nine".

Divisors: 1 11 44971699 494688689