347661 has 6 divisors (see below), whose sum is σ = 502190. Its totient is φ = 231768.

The previous prime is 347651. The next prime is 347671. The reversal of 347661 is 166743.

It is an interprime number because it is at equal distance from previous prime (347651) and next prime (347671).

It can be written as a sum of positive squares in only one way, i.e., 202500 + 145161 = 450^2 + 381^2 .

It is not a de Polignac number, because 347661 - 2⁵ = 347629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19306 + ... + 19323.

2³⁴⁷⁶⁶¹ is an apocalyptic number.

It is an amenable number.

347661 is a deficient number, since it is larger than the sum of its proper divisors (154529).

347661 is a wasteful number, since it uses less digits than its factorization.

347661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38635 (or 38632 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 347661 is about 589.6278487317. The cubic root of 347661 is about 70.3156493404.

The spelling of 347661 in words is "three hundred forty-seven thousand, six hundred sixty-one".