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69439 is a prime number
BaseRepresentation
bin10000111100111111
310112020211
4100330333
54210224
61253251
7406306
oct207477
9115224
1069439
1148197
1234227
13257b6
141b43d
1515894
hex10f3f

69439 has 2 divisors, whose sum is σ = 69440. Its totient is φ = 69438.

The previous prime is 69431. The next prime is 69457. The reversal of 69439 is 93496.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69439 - 23 = 69431 is a prime.

69439 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 69439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34719 + 34720.

It is an arithmetic number, because the mean of its divisors is an integer number (34720).

269439 is an apocalyptic number.

69439 is a deficient number, since it is larger than the sum of its proper divisors (1).

69439 is an equidigital number, since it uses as much as digits as its factorization.

69439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 31.

The square root of 69439 is about 263.5128080379. The cubic root of 69439 is about 41.1024603717.

The spelling of 69439 in words is "sixty-nine thousand, four hundred thirty-nine".