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680397341 = 13173078721
BaseRepresentation
bin101000100011100…
…000101000011101
31202102021202200112
4220203200220131
52343140203331
6151303135405
722601165501
oct5043405035
91672252615
10680397341
1131a080658
1216ba44565
13aac67aa0
1466514301
153eaee32b
hex288e0a1d

680397341 has 8 divisors (see below), whose sum is σ = 775837944. Its totient is φ = 591114240.

The previous prime is 680397317. The next prime is 680397343. The reversal of 680397341 is 143793086.

It can be written as a sum of positive squares in 4 ways, for example, as 211848025 + 468549316 = 14555^2 + 21646^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 680397341 - 210 = 680396317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680397343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1539140 + ... + 1539581.

It is an arithmetic number, because the mean of its divisors is an integer number (96979743).

Almost surely, 2680397341 is an apocalyptic number.

It is an amenable number.

680397341 is a deficient number, since it is larger than the sum of its proper divisors (95440603).

680397341 is a wasteful number, since it uses less digits than its factorization.

680397341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078751.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 680397341 is about 26084.4271740822. The cubic root of 680397341 is about 879.5371795816.

The spelling of 680397341 in words is "six hundred eighty million, three hundred ninety-seven thousand, three hundred forty-one".

Divisors: 1 13 17 221 3078721 40023373 52338257 680397341