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80831 is a prime number
BaseRepresentation
bin10011101110111111
311002212202
4103232333
510041311
61422115
7454442
oct235677
9132782
1080831
1155803
123a93b
132aa3a
1421659
1518e3b
hex13bbf

80831 has 2 divisors, whose sum is σ = 80832. Its totient is φ = 80830.

The previous prime is 80819. The next prime is 80833. The reversal of 80831 is 13808.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-80831 is a prime.

It is a super-2 number, since 2×808312 = 13067301122, which contains 22 as substring.

Together with 80833, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 8 and base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80833) 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 as a sum of consecutive naturals, namely, 40415 + 40416.

It is an arithmetic number, because the mean of its divisors is an integer number (40416).

280831 is an apocalyptic number.

80831 is a deficient number, since it is larger than the sum of its proper divisors (1).

80831 is an equidigital number, since it uses as much as digits as its factorization.

80831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 80831 is about 284.3079316516. The cubic root of 80831 is about 43.2373747773.

The spelling of 80831 in words is "eighty thousand, eight hundred thirty-one".