349780709 has 8 divisors (see below), whose sum is σ = 368760480. Its totient is φ = 330858000.

The previous prime is 349780681. The next prime is 349780759. The reversal of 349780709 is 907087943.

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 349780709 - 2¹² = 349776613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349780759) 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, 1367 + ... + 26484.

It is an arithmetic number, because the mean of its divisors is an integer number (46095060).

Almost surely, 2^349780709 is an apocalyptic number.

It is an amenable number.

349780709 is a deficient number, since it is larger than the sum of its proper divisors (18979771).

349780709 is a wasteful number, since it uses less digits than its factorization.

349780709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28531.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 349780709 is about 18702.4252170674. The cubic root of 349780709 is about 704.5826606298.

The spelling of 349780709 in words is "three hundred forty-nine million, seven hundred eighty thousand, seven hundred nine".