347749 has 4 divisors (see below), whose sum is σ = 349164. Its totient is φ = 346336.

The previous prime is 347747. The next prime is 347759. The reversal of 347749 is 947743.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52900 + 294849 = 230^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 347749 - 2¹ = 347747 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 (347747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232 + ... + 865.

It is an arithmetic number, because the mean of its divisors is an integer number (87291).

2³⁴⁷⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

347749 is a deficient number, since it is larger than the sum of its proper divisors (1415).

347749 is a wasteful number, since it uses less digits than its factorization.

347749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414.

The product of its digits is 21168, while the sum is 34.

The square root of 347749 is about 589.7024673511. The cubic root of 347749 is about 70.3215816089.

The spelling of 347749 in words is "three hundred forty-seven thousand, seven hundred forty-nine".