349945517 has 4 divisors (see below), whose sum is σ = 349995456. Its totient is φ = 349895580.

The previous prime is 349945511. The next prime is 349945571. The reversal of 349945517 is 715549943.

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 349945517 - 2⁸ = 349945261 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 (349945511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12323 + ... + 29184.

It is an arithmetic number, because the mean of its divisors is an integer number (87498864).

Almost surely, 2^349945517 is an apocalyptic number.

It is an amenable number.

349945517 is a deficient number, since it is larger than the sum of its proper divisors (49939).

349945517 is an equidigital number, since it uses as much as digits as its factorization.

349945517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49938.

The product of its digits is 680400, while the sum is 47.

The square root of 349945517 is about 18706.8307577740. The cubic root of 349945517 is about 704.6933038825.

The spelling of 349945517 in words is "three hundred forty-nine million, nine hundred forty-five thousand, five hundred seventeen".