349718189 has 4 divisors (see below), whose sum is σ = 351286656. Its totient is φ = 348149724.

The previous prime is 349718167. The next prime is 349718209. The reversal of 349718189 is 981817943.

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 349718189 - 2¹² = 349714093 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 (349718989) 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, 783899 + ... + 784344.

It is an arithmetic number, because the mean of its divisors is an integer number (87821664).

Almost surely, 2^349718189 is an apocalyptic number.

It is an amenable number.

349718189 is a deficient number, since it is larger than the sum of its proper divisors (1568467).

349718189 is a wasteful number, since it uses less digits than its factorization.

349718189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568466.

The product of its digits is 435456, while the sum is 50.

The square root of 349718189 is about 18700.7537013886. The cubic root of 349718189 is about 704.5406789619.

The spelling of 349718189 in words is "three hundred forty-nine million, seven hundred eighteen thousand, one hundred eighty-nine".