349927661 has 8 divisors (see below), whose sum is σ = 358808184. Its totient is φ = 341063680.

The previous prime is 349927631. The next prime is 349927663. The reversal of 349927661 is 166729943.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15952036 + 333975625 = 3994^2 + 18275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 349927661 - 2¹⁰ = 349926637 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 (349927663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46391 + ... + 53403.

It is an arithmetic number, because the mean of its divisors is an integer number (44851023).

Almost surely, 2^349927661 is an apocalyptic number.

It is an amenable number.

349927661 is a deficient number, since it is larger than the sum of its proper divisors (8880523).

349927661 is a wasteful number, since it uses less digits than its factorization.

349927661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8271.

The product of its digits is 489888, while the sum is 47.

The square root of 349927661 is about 18706.3534928644. The cubic root of 349927661 is about 704.6813179999.

The spelling of 349927661 in words is "three hundred forty-nine million, nine hundred twenty-seven thousand, six hundred sixty-one".