349407661 has 2 divisors, whose sum is σ = 349407662. Its totient is φ = 349407660.

The previous prime is 349407629. The next prime is 349407679. The reversal of 349407661 is 166704943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346146025 + 3261636 = 18605^2 + 1806^2 .

It is a cyclic number.

It is not a de Polignac number, because 349407661 - 2⁵ = 349407629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349407601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174703830 + 174703831.

It is an arithmetic number, because the mean of its divisors is an integer number (174703831).

Almost surely, 2^349407661 is an apocalyptic number.

It is an amenable number.

349407661 is a deficient number, since it is larger than the sum of its proper divisors (1).

349407661 is an equidigital number, since it uses as much as digits as its factorization.

349407661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 349407661 is about 18692.4493044652. The cubic root of 349407661 is about 704.3320877771.

The spelling of 349407661 in words is "three hundred forty-nine million, four hundred seven thousand, six hundred sixty-one".