349247409 has 8 divisors (see below), whose sum is σ = 532186560. Its totient is φ = 199569936.

The previous prime is 349247399. The next prime is 349247413. The reversal of 349247409 is 904742943.

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

It is not a de Polignac number, because 349247409 - 2⁷ = 349247281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (349247909) 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, 8315394 + ... + 8315435.

It is an arithmetic number, because the mean of its divisors is an integer number (66523320).

Almost surely, 2^349247409 is an apocalyptic number.

It is an amenable number.

349247409 is a deficient number, since it is larger than the sum of its proper divisors (182939151).

349247409 is a wasteful number, since it uses less digits than its factorization.

349247409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16630839.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 349247409 is about 18688.1622692013. The cubic root of 349247409 is about 704.2243932430.

The spelling of 349247409 in words is "three hundred forty-nine million, two hundred forty-seven thousand, four hundred nine".