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80159 = 711129
BaseRepresentation
bin10011100100011111
311001221212
4103210133
510031114
61415035
7452462
oct234437
9131855
1080159
1155252
123a47b
132a641
14212d9
1518b3e
hex1391f

80159 has 4 divisors (see below), whose sum is σ = 81360. Its totient is φ = 78960.

The previous prime is 80153. The next prime is 80167. The reversal of 80159 is 95108.

It can be divided in two parts, 80 and 159, that multiplied together give a triangular number (12720 = T159).

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80159 - 28 = 79903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494 + ... + 635.

It is an arithmetic number, because the mean of its divisors is an integer number (20340).

280159 is an apocalyptic number.

80159 is a deficient number, since it is larger than the sum of its proper divisors (1201).

80159 is a wasteful number, since it uses less digits than its factorization.

80159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 80159 is about 283.1236478996. The cubic root of 80159 is about 43.1172211692.

The spelling of 80159 in words is "eighty thousand, one hundred fifty-nine".

Divisors: 1 71 1129 80159