349189905 has 16 divisors (see below), whose sum is σ = 573804864. Its totient is φ = 181200960.

The previous prime is 349189903. The next prime is 349189913. The reversal of 349189905 is 509981943.

It is not a de Polignac number, because 349189905 - 2¹ = 349189903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (349189903) 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, 314031 + ... + 315140.

It is an arithmetic number, because the mean of its divisors is an integer number (35862804).

Almost surely, 2^349189905 is an apocalyptic number.

It is an amenable number.

349189905 is a deficient number, since it is larger than the sum of its proper divisors (224614959).

349189905 is a wasteful number, since it uses less digits than its factorization.

349189905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629216.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 349189905 is about 18686.6236918283. The cubic root of 349189905 is about 704.1857406611.

The spelling of 349189905 in words is "three hundred forty-nine million, one hundred eighty-nine thousand, nine hundred five".