349354635209 has 4 divisors (see below), whose sum is σ = 349560989316. Its totient is φ = 349148281104.

The previous prime is 349354635151. The next prime is 349354635233. The reversal of 349354635209 is 902536453943.

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 277883959609 + 71470675600 = 527147^2 + 267340^2 .

It is a cyclic number.

It is not a de Polignac number, because 349354635209 - 2¹² = 349354631113 is a prime.

It is a super-2 number, since 2×349354635209² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349354635299) 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, 103174514 + ... + 103177899.

It is an arithmetic number, because the mean of its divisors is an integer number (87390247329).

Almost surely, 2^349354635209 is an apocalyptic number.

It is an amenable number.

349354635209 is a deficient number, since it is larger than the sum of its proper divisors (206354107).

349354635209 is a wasteful number, since it uses less digits than its factorization.

349354635209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206354106.

The product of its (nonzero) digits is 10497600, while the sum is 53.

The spelling of 349354635209 in words is "three hundred forty-nine billion, three hundred fifty-four million, six hundred thirty-five thousand, two hundred nine".