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399239 is a prime number
BaseRepresentation
bin1100001011110000111
3202021122122
41201132013
5100233424
612320155
73251651
oct1413607
9667578
10399239
11252a55
1217305b
1310c949
14a56d1
157d45e
hex61787

399239 has 2 divisors, whose sum is σ = 399240. Its totient is φ = 399238.

The previous prime is 399227. The next prime is 399241. The reversal of 399239 is 932993.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-399239 is a prime.

Together with 399241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 399199 and 399208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199619 + 199620.

It is an arithmetic number, because the mean of its divisors is an integer number (199620).

2399239 is an apocalyptic number.

399239 is a deficient number, since it is larger than the sum of its proper divisors (1).

399239 is an equidigital number, since it uses as much as digits as its factorization.

399239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 35.

The square root of 399239 is about 631.8536222892. The cubic root of 399239 is about 73.6338745100.

The spelling of 399239 in words is "three hundred ninety-nine thousand, two hundred thirty-nine".