347109661 has 4 divisors (see below), whose sum is σ = 347262300. Its totient is φ = 346957024.

The previous prime is 347109643. The next prime is 347109713. The reversal of 347109661 is 166901743.

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 292068100 + 55041561 = 17090^2 + 7419^2 .

It is a cyclic number.

It is not a de Polignac number, because 347109661 - 2⁷ = 347109533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 347109661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347109361) 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, 72856 + ... + 77473.

It is an arithmetic number, because the mean of its divisors is an integer number (86815575).

Almost surely, 2^347109661 is an apocalyptic number.

It is an amenable number.

347109661 is a deficient number, since it is larger than the sum of its proper divisors (152639).

347109661 is a wasteful number, since it uses less digits than its factorization.

347109661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152638.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 347109661 is about 18630.8792331441. The cubic root of 347109661 is about 702.7845959602.

The spelling of 347109661 in words is "three hundred forty-seven million, one hundred nine thousand, six hundred sixty-one".