349908865 has 4 divisors (see below), whose sum is σ = 419890644. Its totient is φ = 279927088.

The previous prime is 349908851. The next prime is 349908869. The reversal of 349908865 is 568809943.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568809943 = 13 ⋅43754611.

It can be written as a sum of positive squares in 2 ways, for example, as 115175824 + 234733041 = 10732^2 + 15321^2 .

It is a cyclic number.

It is not a de Polignac number, because 349908865 - 2⁷ = 349908737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349908869) 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, 34990882 + ... + 34990891.

It is an arithmetic number, because the mean of its divisors is an integer number (104972661).

Almost surely, 2^349908865 is an apocalyptic number.

It is an amenable number.

349908865 is a deficient number, since it is larger than the sum of its proper divisors (69981779).

349908865 is an equidigital number, since it uses as much as digits as its factorization.

349908865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69981778.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 349908865 is about 18705.8510899665. The cubic root of 349908865 is about 704.6687006996.

The spelling of 349908865 in words is "three hundred forty-nine million, nine hundred eight thousand, eight hundred sixty-five".