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78983 = 194157
BaseRepresentation
bin10011010010000111
311000100022
4103102013
510011413
61405355
7446162
oct232207
9130308
1078983
1154383
123985b
1329c48
1420ad9
1518608
hex13487

78983 has 4 divisors (see below), whose sum is σ = 83160. Its totient is φ = 74808.

The previous prime is 78979. The next prime is 78989. The reversal of 78983 is 38987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38987 = 132999.

It is a cyclic number.

It is not a de Polignac number, because 78983 - 22 = 78979 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78989) 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, 2060 + ... + 2097.

It is an arithmetic number, because the mean of its divisors is an integer number (20790).

278983 is an apocalyptic number.

78983 is a deficient number, since it is larger than the sum of its proper divisors (4177).

78983 is a wasteful number, since it uses less digits than its factorization.

78983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176.

The product of its digits is 12096, while the sum is 35.

The square root of 78983 is about 281.0391431812. The cubic root of 78983 is about 42.9053262314.

The spelling of 78983 in words is "seventy-eight thousand, nine hundred eighty-three".

Divisors: 1 19 4157 78983