347891 has 2 divisors, whose sum is σ = 347892. Its totient is φ = 347890.

The previous prime is 347887. The next prime is 347899. The reversal of 347891 is 198743.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 347891 - 2² = 347887 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 347891.

It is not a weakly prime, because it can be changed into another prime (347899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173945 + 173946.

It is an arithmetic number, because the mean of its divisors is an integer number (173946).

2³⁴⁷⁸⁹¹ is an apocalyptic number.

347891 is a deficient number, since it is larger than the sum of its proper divisors (1).

347891 is an equidigital number, since it uses as much as digits as its factorization.

347891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 347891 is about 589.8228547623. The cubic root of 347891 is about 70.3311520229.

The spelling of 347891 in words is "three hundred forty-seven thousand, eight hundred ninety-one".