349747517 has 4 divisors (see below), whose sum is σ = 399711456. Its totient is φ = 299783580.

The previous prime is 349747513. The next prime is 349747597. The reversal of 349747517 is 715747943.

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 349747517 - 2² = 349747513 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 (349747513) 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, 24981959 + ... + 24981972.

It is an arithmetic number, because the mean of its divisors is an integer number (99927864).

Almost surely, 2^349747517 is an apocalyptic number.

It is an amenable number.

349747517 is a deficient number, since it is larger than the sum of its proper divisors (49963939).

349747517 is an equidigital number, since it uses as much as digits as its factorization.

349747517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49963938.

The product of its digits is 740880, while the sum is 47.

The square root of 349747517 is about 18701.5378244678. The cubic root of 349747517 is about 704.5603730966.

The spelling of 349747517 in words is "three hundred forty-nine million, seven hundred forty-seven thousand, five hundred seventeen".