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685792961 = 7487120113
BaseRepresentation
bin101000111000000…
…101111011000001
31202210102220002022
4220320011323001
52401030333321
6152014531225
722665100250
oct5070057301
91683386068
10685792961
11322126447
12171806b15
13ac106969
146711a797
1540317dab
hex28e05ec1

685792961 has 8 divisors (see below), whose sum is σ = 783963264. Its totient is φ = 587672640.

The previous prime is 685792907. The next prime is 685792979. The reversal of 685792961 is 169297586.

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 685792961 - 210 = 685791937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (685792901) 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, 24041 + ... + 44153.

It is an arithmetic number, because the mean of its divisors is an integer number (97995408).

Almost surely, 2685792961 is an apocalyptic number.

It is an amenable number.

685792961 is a deficient number, since it is larger than the sum of its proper divisors (98170303).

685792961 is a wasteful number, since it uses less digits than its factorization.

685792961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24991.

The product of its digits is 1632960, while the sum is 53.

The square root of 685792961 is about 26187.6490162825. The cubic root of 685792961 is about 881.8560005587.

The spelling of 685792961 in words is "six hundred eighty-five million, seven hundred ninety-two thousand, nine hundred sixty-one".

Divisors: 1 7 4871 20113 34097 140791 97970423 685792961