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78929 is a prime number

78929 has 2 divisors, whose sum is σ = 78930. Its totient is φ = 78928.

The previous prime is 78919. The next prime is 78941. The reversal of 78929 is 92987.

78929 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78400 + 529 = 280^2 + 23^2 .

It is an emirp because it is prime and its reverse (92987) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-78929 is a prime.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (78919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39464 + 39465.

It is an arithmetic number, because the mean of its divisors is an integer number (39465).

278929 is an apocalyptic number.

It is an amenable number.

78929 is a deficient number, since it is larger than the sum of its proper divisors (1).

78929 is an equidigital number, since it uses as much as digits as its factorization.

78929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 78929 is about 280.9430547282. The cubic root of 78929 is about 42.8955460010.

It can be divided in two parts, 789 and 29, that added together give a palindrome (818).

The spelling of 78929 in words is "seventy-eight thousand, nine hundred twenty-nine".