349243509 has 4 divisors (see below), whose sum is σ = 465658016. Its totient is φ = 232829004.

The previous prime is 349243487. The next prime is 349243519. The reversal of 349243509 is 905342943.

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 not a de Polignac number, because 349243509 - 2⁷ = 349243381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349243519) 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, 58207249 + ... + 58207254.

It is an arithmetic number, because the mean of its divisors is an integer number (116414504).

Almost surely, 2^349243509 is an apocalyptic number.

It is an amenable number.

349243509 is a deficient number, since it is larger than the sum of its proper divisors (116414507).

349243509 is a wasteful number, since it uses less digits than its factorization.

349243509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116414506.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 349243509 is about 18688.0579247818. The cubic root of 349243509 is about 704.2217719061.

The spelling of 349243509 in words is "three hundred forty-nine million, two hundred forty-three thousand, five hundred nine".