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82591 is a prime number
BaseRepresentation
bin10100001010011111
311012021221
4110022133
510120331
61434211
7462535
oct241237
9135257
1082591
1157063
123b967
132b792
1422155
1519711
hex1429f

82591 has 2 divisors, whose sum is σ = 82592. Its totient is φ = 82590.

The previous prime is 82571. The next prime is 82601. The reversal of 82591 is 19528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82591 - 25 = 82559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41295 + 41296.

It is an arithmetic number, because the mean of its divisors is an integer number (41296).

282591 is an apocalyptic number.

82591 is a deficient number, since it is larger than the sum of its proper divisors (1).

82591 is an equidigital number, since it uses as much as digits as its factorization.

82591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 25.

The square root of 82591 is about 287.3864993350. The cubic root of 82591 is about 43.5489386245.

The spelling of 82591 in words is "eighty-two thousand, five hundred ninety-one".