Search a number
809668983 = 31914204719
BaseRepresentation
bin110000010000101…
…001000101110111
32002102112110001010
4300100221011313
53124233401413
6212202003303
726031033654
oct6020510567
92072473033
10809668983
11386045322
121a71a6533
13cb989b96
1479764c2b
154b136dc3
hex30429177

809668983 has 8 divisors (see below), whose sum is σ = 1136377600. Its totient is φ = 511369848.

The previous prime is 809668967. The next prime is 809668987. The reversal of 809668983 is 389866908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 809668983 - 24 = 809668967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 14204719 = 809668983 / (8 + 0 + 9 + 6 + 6 + 8 + 9 + 8 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809668987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7102303 + ... + 7102416.

It is an arithmetic number, because the mean of its divisors is an integer number (142047200).

Almost surely, 2809668983 is an apocalyptic number.

809668983 is a deficient number, since it is larger than the sum of its proper divisors (326708617).

809668983 is a wasteful number, since it uses less digits than its factorization.

809668983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14204741.

The product of its (nonzero) digits is 4478976, while the sum is 57.

The square root of 809668983 is about 28454.6829713494. The cubic root of 809668983 is about 932.0427534005.

The spelling of 809668983 in words is "eight hundred nine million, six hundred sixty-eight thousand, nine hundred eighty-three".