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30839 is a prime number
BaseRepresentation
bin111100001110111
31120022012
413201313
51441324
6354435
7155624
oct74167
946265
1030839
1121196
1215a1b
1311063
14b34b
15920e
hex7877

30839 has 2 divisors, whose sum is σ = 30840. Its totient is φ = 30838.

The previous prime is 30829. The next prime is 30841. The reversal of 30839 is 93803.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-30839 is a prime.

Together with 30841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15419 + 15420.

It is an arithmetic number, because the mean of its divisors is an integer number (15420).

230839 is an apocalyptic number.

30839 is a deficient number, since it is larger than the sum of its proper divisors (1).

30839 is an equidigital number, since it uses as much as digits as its factorization.

30839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 30839 is about 175.6103641588. The cubic root of 30839 is about 31.3593290629.

The spelling of 30839 in words is "thirty thousand, eight hundred thirty-nine".