349286809 has 4 divisors (see below), whose sum is σ = 364473216. Its totient is φ = 334100404.

The previous prime is 349286803. The next prime is 349286837. The reversal of 349286809 is 908682943.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 349286809 - 2⁷ = 349286681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349286803) 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, 7593169 + ... + 7593214.

It is an arithmetic number, because the mean of its divisors is an integer number (91118304).

Almost surely, 2^349286809 is an apocalyptic number.

It is an amenable number.

349286809 is a deficient number, since it is larger than the sum of its proper divisors (15186407).

349286809 is a wasteful number, since it uses less digits than its factorization.

349286809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15186406.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 349286809 is about 18689.2163827165. The cubic root of 349286809 is about 704.2508743727.

The spelling of 349286809 in words is "three hundred forty-nine million, two hundred eighty-six thousand, eight hundred nine".