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680871625 = 5374118979
BaseRepresentation
bin101000100101010…
…100011011001001
31202110011212021121
4220211110123021
52343300343000
6151321235241
722605212320
oct5045243311
91673155247
10680871625
1131a374a25
12170032b21
13ab0a2925
14665d90b7
153eb94b1a
hex289546c9

680871625 has 32 divisors (see below), whose sum is σ = 994855680. Its totient is φ = 455472000.

The previous prime is 680871613. The next prime is 680871629. The reversal of 680871625 is 526178086.

It is not a de Polignac number, because 680871625 - 217 = 680740553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680871629) 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 31 ways as a sum of consecutive naturals, for example, 26386 + ... + 45364.

It is an arithmetic number, because the mean of its divisors is an integer number (31089240).

Almost surely, 2680871625 is an apocalyptic number.

It is an amenable number.

680871625 is a deficient number, since it is larger than the sum of its proper divisors (313984055).

680871625 is a wasteful number, since it uses less digits than its factorization.

680871625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19042 (or 19032 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 680871625 is about 26093.5169151266. The cubic root of 680871625 is about 879.7414981939.

The spelling of 680871625 in words is "six hundred eighty million, eight hundred seventy-one thousand, six hundred twenty-five".

Divisors: 1 5 7 25 35 41 125 175 205 287 875 1025 1435 5125 7175 18979 35875 94895 132853 474475 664265 778139 2372375 3321325 3890695 5446973 16606625 19453475 27234865 97267375 136174325 680871625