347881 has 4 divisors (see below), whose sum is σ = 349264. Its totient is φ = 346500.

The previous prime is 347873. The next prime is 347887. The reversal of 347881 is 188743.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 188743 = 173 ⋅1091.

It is a cyclic number.

It is not a de Polignac number, because 347881 - 2³ = 347873 is a prime.

It is a super-2 number, since 2×347881² = 242042380322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (347887) 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, 195 + ... + 856.

It is an arithmetic number, because the mean of its divisors is an integer number (87316).

2³⁴⁷⁸⁸¹ is an apocalyptic number.

It is an amenable number.

347881 is a deficient number, since it is larger than the sum of its proper divisors (1383).

347881 is a wasteful number, since it uses less digits than its factorization.

347881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382.

The product of its digits is 5376, while the sum is 31.

The square root of 347881 is about 589.8143775799. The cubic root of 347881 is about 70.3304781353.

The spelling of 347881 in words is "three hundred forty-seven thousand, eight hundred eighty-one".