349368661 has 4 divisors (see below), whose sum is σ = 349555500. Its totient is φ = 349181824.

The previous prime is 349368659. The next prime is 349368671. The reversal of 349368661 is 166863943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166863943 = 509 ⋅327827.

It can be written as a sum of positive squares in 2 ways, for example, as 291760561 + 57608100 = 17081^2 + 7590^2 .

It is a cyclic number.

It is not a de Polignac number, because 349368661 - 2¹ = 349368659 is a prime.

It is a super-2 number, since 2×349368661² = 244116922577865842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349368611) 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, 90586 + ... + 94363.

It is an arithmetic number, because the mean of its divisors is an integer number (87388875).

Almost surely, 2^349368661 is an apocalyptic number.

It is an amenable number.

349368661 is a deficient number, since it is larger than the sum of its proper divisors (186839).

349368661 is a wasteful number, since it uses less digits than its factorization.

349368661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186838.

The product of its digits is 559872, while the sum is 46.

The square root of 349368661 is about 18691.4060733804. The cubic root of 349368661 is about 704.3058815462.

The spelling of 349368661 in words is "three hundred forty-nine million, three hundred sixty-eight thousand, six hundred sixty-one".