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80198095 = 5174332179
BaseRepresentation
bin1001100011110…
…11100111001111
312120220111002211
410301323213033
5131012314340
611542531251
71662446455
oct461734717
9176814084
1080198095
11412a701a
1222a36b27
13137cc5c3
14a9189d5
1570925ea
hex4c7b9cf

80198095 has 16 divisors (see below), whose sum is σ = 102180960. Its totient is φ = 60217344.

The previous prime is 80198093. The next prime is 80198101. The reversal of 80198095 is 59089108.

It is a cyclic number.

It is not a de Polignac number, because 80198095 - 21 = 80198093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80198093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35716 + ... + 37894.

It is an arithmetic number, because the mean of its divisors is an integer number (6386310).

Almost surely, 280198095 is an apocalyptic number.

80198095 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

80198095 is a deficient number, since it is larger than the sum of its proper divisors (21982865).

80198095 is a wasteful number, since it uses less digits than its factorization.

80198095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 80198095 is about 8955.3389103931. The cubic root of 80198095 is about 431.2422971389.

The spelling of 80198095 in words is "eighty million, one hundred ninety-eight thousand, ninety-five".

Divisors: 1 5 17 85 433 2165 2179 7361 10895 36805 37043 185215 943507 4717535 16039619 80198095