78347 has 2 divisors, whose sum is σ = 78348. Its totient is φ = 78346.

The previous prime is 78341. The next prime is 78367. The reversal of 78347 is 74387.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78347 - 2⁶ = 78283 is a prime.

It is a super-2 number, since 2×78347² = 12276504818, which contains 22 as substring.

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 (78341) 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, 39173 + 39174.

It is an arithmetic number, because the mean of its divisors is an integer number (39174).

2⁷⁸³⁴⁷ is an apocalyptic number.

78347 is a deficient number, since it is larger than the sum of its proper divisors (1).

78347 is an equidigital number, since it uses as much as digits as its factorization.

78347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 29.

The square root of 78347 is about 279.9053411423. The cubic root of 78347 is about 42.7898526035.

The spelling of 78347 in words is "seventy-eight thousand, three hundred forty-seven".