349249989 has 16 divisors (see below), whose sum is σ = 537883200. Its totient is φ = 199215360.

The previous prime is 349249981. The next prime is 349250003. The reversal of 349249989 is 989942943.

It is not a de Polignac number, because 349249989 - 2³ = 349249981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349249981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310714 + ... + 311835.

It is an arithmetic number, because the mean of its divisors is an integer number (33617700).

Almost surely, 2^349249989 is an apocalyptic number.

It is an amenable number.

349249989 is a deficient number, since it is larger than the sum of its proper divisors (188633211).

349249989 is a wasteful number, since it uses less digits than its factorization.

349249989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622580.

The product of its digits is 5038848, while the sum is 57.

The square root of 349249989 is about 18688.2312967279. The cubic root of 349249989 is about 704.2261273475.

The spelling of 349249989 in words is "three hundred forty-nine million, two hundred forty-nine thousand, nine hundred eighty-nine".