347 has 2 divisors, whose sum is σ = 348. Its totient is φ = 346.

The previous prime is 337. The next prime is 349. The reversal of 347 is 743.

Adding to 347 its sum of digits (14), we get a square (361 = 19^{2}).

Subtracting from 347 its sum of digits (14), we obtain a palindrome (333).

It can be divided in two parts, 3 and 47, that multiplied together give a palindrome (141).

It is a strong prime.

347 is a truncatable prime.

It is an emirp because it is prime and its reverse (743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 347 - 2^{4} = 331 is a prime.

Together with 349, it forms a pair of twin primes.

It is a Chen prime.

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

It is a plaindrome in base 4, base 6, base 10, base 12, base 14 and base 16.

It is a nialpdrome in base 8.

It is not a weakly prime, because it can be changed into another prime (349) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173 + 174.

It is an arithmetic number, because the mean of its divisors is an integer number (174).

347 is a Friedman number, since it can be written as 7^3+4, using all its digits and the basic arithmetic operations.

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

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

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

The product of its digits is 84, while the sum is 14.

The square root of 347 is about 18.6279360102. The cubic root of 347 is about 7.0271057883.

The spelling of 347 in words is "three hundred forty-seven", and thus it is an aban number and an iban number.

• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.060 sec. • engine limits •