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80730471 = 3127211891
BaseRepresentation
bin1001100111111…
…01100101100111
312121220112101110
410303331211213
5131131333341
612002200103
72000124543
oct463754547
9177815343
1080730471
114162aaa8
1223053033
1313957a13
14aa16a23
15714a216
hex4cfd967

80730471 has 8 divisors (see below), whose sum is σ = 108488704. Its totient is φ = 53396280.

The previous prime is 80730469. The next prime is 80730491. The reversal of 80730471 is 17403708.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80730471 - 21 = 80730469 is a prime.

It is a super-3 number, since 3×807304713 (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80730431) 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 7 ways as a sum of consecutive naturals, for example, 105565 + ... + 106326.

It is an arithmetic number, because the mean of its divisors is an integer number (13561088).

Almost surely, 280730471 is an apocalyptic number.

80730471 is a deficient number, since it is larger than the sum of its proper divisors (27758233).

80730471 is a wasteful number, since it uses less digits than its factorization.

80730471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212021.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 80730471 is about 8985.0136894720. The cubic root of 80730471 is about 432.1944265862.

The spelling of 80730471 in words is "eighty million, seven hundred thirty thousand, four hundred seventy-one".

Divisors: 1 3 127 381 211891 635673 26910157 80730471