347861 has 4 divisors (see below), whose sum is σ = 350112. Its totient is φ = 345612.

The previous prime is 347849. The next prime is 347873. The reversal of 347861 is 168743.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (347849) and next prime (347873).

It is a cyclic number.

It is not a de Polignac number, because 347861 - 2¹⁸ = 85717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (87528).

2³⁴⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

347861 is a deficient number, since it is larger than the sum of its proper divisors (2251).

347861 is a wasteful number, since it uses less digits than its factorization.

347861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250.

The product of its digits is 4032, while the sum is 29.

The square root of 347861 is about 589.7974228496. The cubic root of 347861 is about 70.3291303214.

The spelling of 347861 in words is "three hundred forty-seven thousand, eight hundred sixty-one".