349985717 has 8 divisors (see below), whose sum is σ = 370886040. Its totient is φ = 329674240.

The previous prime is 349985683. The next prime is 349985723. The reversal of 349985717 is 717589943.

It can be written as a sum of positive squares in 4 ways, for example, as 12859396 + 337126321 = 3586^2 + 18361^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 349985717 - 2¹⁸ = 349723573 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 (349985117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145988 + ... + 148365.

It is an arithmetic number, because the mean of its divisors is an integer number (46360755).

Almost surely, 2^349985717 is an apocalyptic number.

It is an amenable number.

349985717 is a deficient number, since it is larger than the sum of its proper divisors (20900323).

349985717 is a wasteful number, since it uses less digits than its factorization.

349985717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294423.

The product of its digits is 1905120, while the sum is 53.

The square root of 349985717 is about 18707.9052007433. The cubic root of 349985717 is about 704.7202867363.

The spelling of 349985717 in words is "three hundred forty-nine million, nine hundred eighty-five thousand, seven hundred seventeen".