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78681083 = 1317356023
BaseRepresentation
bin1001011000010…
…01001111111011
312111001102011012
410230021033323
5130120243313
611450224135
71643530625
oct454111773
9174042135
1078681083
1140460298
122242504b
13133bac70
14a641c15
156d92da8
hex4b093fb

78681083 has 8 divisors (see below), whose sum is σ = 89718048. Its totient is φ = 68356224.

The previous prime is 78681067. The next prime is 78681107. The reversal of 78681083 is 38018687.

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

It is a cyclic number.

It is not a de Polignac number, because 78681083 - 24 = 78681067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78681083.

It is not an unprimeable number, because it can be changed into a prime (78681683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177791 + ... + 178232.

It is an arithmetic number, because the mean of its divisors is an integer number (11214756).

Almost surely, 278681083 is an apocalyptic number.

78681083 is a deficient number, since it is larger than the sum of its proper divisors (11036965).

78681083 is a wasteful number, since it uses less digits than its factorization.

78681083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356053.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 78681083 is about 8870.2357916799. The cubic root of 78681083 is about 428.5058707606.

The spelling of 78681083 in words is "seventy-eight million, six hundred eighty-one thousand, eighty-three".

Divisors: 1 13 17 221 356023 4628299 6052391 78681083