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684091 is a prime number
BaseRepresentation
bin10100111000000111011
31021202101201
42213000323
5133342331
622355031
75546302
oct2470073
91252351
10684091
11427a71
1228ba77
131ac4b5
1413b439
15d7a61
hexa703b

684091 has 2 divisors, whose sum is σ = 684092. Its totient is φ = 684090.

The previous prime is 684053. The next prime is 684109. The reversal of 684091 is 190486.

684091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (684109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684091 - 215 = 651323 is a prime.

684091 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (684191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342045 + 342046.

It is an arithmetic number, because the mean of its divisors is an integer number (342046).

2684091 is an apocalyptic number.

684091 is a deficient number, since it is larger than the sum of its proper divisors (1).

684091 is an equidigital number, since it uses as much as digits as its factorization.

684091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 684091 is about 827.0979385780. The cubic root of 684091 is about 88.1125883296.

The spelling of 684091 in words is "six hundred eighty-four thousand, ninety-one".